अनुक्रम \(4,8,12,16,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(4,8,12,16,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=4n\)
B \(a_n=n+4\)
C \(a_n=3n+1\)
D \(a_n=4n-1\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=4n\)
Step 1
Concept
Each term is a multiple of (4), so \(a_n=4n\). In exams, check multiple-based sequences using (kn).
Step 2
Why this answer is correct
The correct answer is A. \(a_n=4n\). Each term is a multiple of (4), so \(a_n=4n\). In exams, check multiple-based sequences using (kn).
Step 3
Exam Tip
हर पद (4) का गुणज है, इसलिए \(a_n=4n\) है। परीक्षा में गुणज वाले अनुक्रमों को (kn) से जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=6n+2\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=6n+2\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (18)
B (20)
C (22)
D (24)
Explanation opens after your attempt
Step 1
Concept
\(a_3=6\times3+2=20\). In exams, multiply first and then add the constant.
Step 2
Why this answer is correct
The correct answer is B. (20). \(a_3=6\times3+2=20\). In exams, multiply first and then add the constant.
Step 3
Exam Tip
\(a_3=6\times3+2=20\) है। परीक्षा में पहले गुणा करें और फिर स्थिर संख्या जोड़ें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(11,22,33,44,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(11,22,33,44,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=10n+1\)
B \(a_n=n+11\)
C \(a_n=11n\)
D \(a_n=22n\)
Explanation opens after your attempt
Correct Answer
C. \(a_n=11n\)
Step 1
Concept
Each term is a multiple of (11), so \(a_n=11n\) is correct. In exams, identify equal multiples directly.
Step 2
Why this answer is correct
The correct answer is C. \(a_n=11n\). Each term is a multiple of (11), so \(a_n=11n\) is correct. In exams, identify equal multiples directly.
Step 3
Exam Tip
हर पद (11) का गुणज है, इसलिए \(a_n=11n\) सही है। परीक्षा में समान गुणजों को सीधे पहचानें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=9n-4\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=9n-4\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (28)
B (30)
C (32)
D (34)
Explanation opens after your attempt
Step 1
Concept
\(a_4=9\times4-4=32\). In exams, subtract only after multiplying.
Step 2
Why this answer is correct
The correct answer is C. (32). \(a_4=9\times4-4=32\). In exams, subtract only after multiplying.
Step 3
Exam Tip
\(a_4=9\times4-4=32\) है। परीक्षा में गुणा के बाद घटाव करें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(3,8,13,18,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(3,8,13,18,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=5n-2\)
B \(a_n=3n+5\)
C \(a_n=5n+2\)
D \(a_n=8n-5\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=5n-2\)
Step 1
Concept
The first term is (3) and the difference is (5), so \(a_n=5n-2\). In exams, take the difference as the coefficient of (n).
Step 2
Why this answer is correct
The correct answer is A. \(a_n=5n-2\). The first term is (3) and the difference is (5), so \(a_n=5n-2\). In exams, take the difference as the coefficient of (n).
Step 3
Exam Tip
पहला पद (3) और अंतर (5) है, इसलिए \(a_n=5n-2\) है। परीक्षा में अंतर को (n) का गुणांक मानें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=n^2+3\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=n^2+3\), what is the value of \(a_5\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (25)
B (26)
C (27)
D (28)
Explanation opens after your attempt
Step 1
Concept
\(a_5=5^2+3=28\). In exams, find the square first and then add (3).
Step 2
Why this answer is correct
The correct answer is D. (28). \(a_5=5^2+3=28\). In exams, find the square first and then add (3).
Step 3
Exam Tip
\(a_5=5^2+3=28\) है। परीक्षा में पहले वर्ग निकालें और फिर (3) जोड़ें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(4,7,12,19,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(4,7,12,19,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=2n+2\)
B \(a_n=n^2+3\)
C \(a_n=n^2+2n\)
D \(a_n=3n+1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=n^2+3\)
Step 1
Concept
Using \(n^2+3\) gives (4,7,12,19). In exams, test options by putting (n=1,2,3).
Step 2
Why this answer is correct
The correct answer is B. \(a_n=n^2+3\). Using \(n^2+3\) gives (4,7,12,19). In exams, test options by putting (n=1,2,3).
Step 3
Exam Tip
\(n^2+3\) रखने पर (4,7,12,19) मिलते हैं। परीक्षा में विकल्पों में (n=1,2,3) रखकर जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=14-3n\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=14-3n\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (3)
B (5)
C (7)
D (9)
Explanation opens after your attempt
Step 1
Concept
\(a_3=14-9=5\). In exams, subtract (3n) correctly in a decreasing formula.
Step 2
Why this answer is correct
The correct answer is B. (5). \(a_3=14-9=5\). In exams, subtract (3n) correctly in a decreasing formula.
Step 3
Exam Tip
\(a_3=14-9=5\) है। परीक्षा में घटते सूत्र में (3n) को सही घटाएँ।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(11,8,5,2,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(11,8,5,2,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=11-3n\)
B \(a_n=14-3n\)
C \(a_n=3n+8\)
D \(a_n=8-n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=14-3n\)
Step 1
Concept
At (n=1) it gives (11), and at (n=2) it gives (8), so \(a_n=14-3n\). In exams, treat a decreasing difference as negative.
Step 2
Why this answer is correct
The correct answer is B. \(a_n=14-3n\). At (n=1) it gives (11), and at (n=2) it gives (8), so \(a_n=14-3n\). In exams, treat a decreasing difference as negative.
Step 3
Exam Tip
(n=1) पर (11) और (n=2) पर (8) मिलता है, इसलिए \(a_n=14-3n\) है। परीक्षा में घटते अंतर को ऋणात्मक समझें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=5^n\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=5^n\), what is the value of \(a_2\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (10)
B (15)
C (25)
D (50)
Explanation opens after your attempt
Step 1
Concept
\(a_2=5^2=25\). In exams, identify the base and exponent separately.
Step 2
Why this answer is correct
The correct answer is C. (25). \(a_2=5^2=25\). In exams, identify the base and exponent separately.
Step 3
Exam Tip
\(a_2=5^2=25\) है। परीक्षा में आधार और घातांक को अलग पहचानें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(5,25,125,625,\ldots\) के लिए सही नियम कौन-सा है?
Which rule is correct for the sequence \(5,25,125,625,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=5n\)
B \(a_n=5^n\)
C \(a_n=n^5\)
D \(a_n=5^n-1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=5^n\)
Step 1
Concept
These terms are consecutive powers of (5). In exams, check \(5^n\) when you see (5,25,125).
Step 2
Why this answer is correct
The correct answer is B. \(a_n=5^n\). These terms are consecutive powers of (5). In exams, check \(5^n\) when you see (5,25,125).
Step 3
Exam Tip
ये पद (5) की क्रमिक घातें हैं। परीक्षा में (5,25,125) देखकर \(5^n\) जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=3n^2\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=3n^2\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (36)
B (42)
C (48)
D (54)
Explanation opens after your attempt
Step 1
Concept
\(a_4=3\times4^2=48\). In exams, square first and then multiply by (3).
Step 2
Why this answer is correct
The correct answer is C. (48). \(a_4=3\times4^2=48\). In exams, square first and then multiply by (3).
Step 3
Exam Tip
\(a_4=3\times4^2=48\) है। परीक्षा में वर्ग निकालकर (3) से गुणा करें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(3,12,27,48,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(3,12,27,48,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=3n^2\)
B \(a_n=3n\)
C \(a_n=n^3\)
D \(a_n=4n^2-1\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=3n^2\)
Step 1
Concept
These terms come from \(3n^2\). In exams, test the square-based rule on the first three terms.
Step 2
Why this answer is correct
The correct answer is A. \(a_n=3n^2\). These terms come from \(3n^2\). In exams, test the square-based rule on the first three terms.
Step 3
Exam Tip
ये पद \(3n^2\) से मिलते हैं। परीक्षा में वर्ग आधारित नियम को पहले तीन पदों पर जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=\frac{3n}{2}\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=\frac{3n}{2}\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (4)
B (5)
C (6)
D (8)
Explanation opens after your attempt
Step 1
Concept
\(a_4=\frac{3\times4}{2}=6\). In exams, simplify the fraction before answering.
Step 2
Why this answer is correct
The correct answer is C. (6). \(a_4=\frac{3\times4}{2}=6\). In exams, simplify the fraction before answering.
Step 3
Exam Tip
\(a_4=\frac{3\times4}{2}=6\) है। परीक्षा में भिन्न को सरल करके उत्तर दें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(\frac{3}{2},3,\frac{9}{2},6,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(\frac{3}{2},3,\frac{9}{2},6,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=\frac{n}{3}\)
B \(a_n=\frac{3n}{2}\)
C \(a_n=2n\)
D \(a_n=3n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=\frac{3n}{2}\)
Step 1
Concept
Each term is the next multiple of \(\frac{3}{2}\). In exams, write fractional multiples as (kn).
Step 2
Why this answer is correct
The correct answer is B. \(a_n=\frac{3n}{2}\). Each term is the next multiple of \(\frac{3}{2}\). In exams, write fractional multiples as (kn).
Step 3
Exam Tip
हर पद \(\frac{3}{2}\) का अगला गुणज है। परीक्षा में भिन्न गुणजों को (kn) के रूप में लिखें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=2n-3\) है, तो कौन-सा पद (15) के बराबर होगा?
If \(a_n=2n-3\), which term will be equal to (15)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (n=7)
B (n=8)
C (n=9)
D (n=10)
Explanation opens after your attempt
Step 1
Concept
From (2n-3=15), we get (n=9). In exams, equate the formula to the given value when term number is asked.
Step 2
Why this answer is correct
The correct answer is C. (n=9). From (2n-3=15), we get (n=9). In exams, equate the formula to the given value when term number is asked.
Step 3
Exam Tip
(2n-3=15) से (n=9) मिलता है। परीक्षा में पद संख्या पूछी जाए तो सूत्र को दिए मान के बराबर रखें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(-1,1,3,5,\ldots\) में (15) कौन-सा पद है?
In the sequence \(-1,1,3,5,\ldots\), which term is (15)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A सातवाँ पद / (7)th term
B आठवाँ पद / (8)th term
C नौवाँ पद / (9)th term
D दसवाँ पद / (10)th term
Explanation opens after your attempt
Correct Answer
C. नौवाँ पद / (9)th term
Step 1
Concept
Its rule is \(a_n=2n-3\), and (2n-3=15) gives (n=9). In exams, form the general term first to find the term number.
Step 2
Why this answer is correct
The correct answer is C. नौवाँ पद / (9)th term. Its rule is \(a_n=2n-3\), and (2n-3=15) gives (n=9). In exams, form the general term first to find the term number.
Step 3
Exam Tip
इसका नियम \(a_n=2n-3\) है और (2n-3=15) से (n=9) है। परीक्षा में पहले सामान्य पद बनाकर पद संख्या निकालें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=n^3\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=n^3\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (9)
B (18)
C (27)
D (36)
Explanation opens after your attempt
Step 1
Concept
\(a_3=3^3=27\). In exams, multiply the number three times when finding a cube.
Step 2
Why this answer is correct
The correct answer is C. (27). \(a_3=3^3=27\). In exams, multiply the number three times when finding a cube.
Step 3
Exam Tip
\(a_3=3^3=27\) है। परीक्षा में घन निकालते समय संख्या को तीन बार गुणा करें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(1,8,27,64,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(1,8,27,64,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=n^2\)
B \(a_n=n^3\)
C \(a_n=3n\)
D \(a_n=2^n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=n^3\)
Step 1
Concept
These are perfect cubes, so \(a_n=n^3\). In exams, recognize (1,8,27,64) as cube numbers.
Step 2
Why this answer is correct
The correct answer is B. \(a_n=n^3\). These are perfect cubes, so \(a_n=n^3\). In exams, recognize (1,8,27,64) as cube numbers.
Step 3
Exam Tip
ये पूर्ण घन हैं, इसलिए \(a_n=n^3\) है। परीक्षा में (1,8,27,64) को घन संख्याओं के रूप में पहचानें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=n^3+1\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=n^3+1\), what is the value of \(a_2\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (7)
B (8)
C (9)
D (10)
Explanation opens after your attempt
Step 1
Concept
\(a_2=2^3+1=9\). In exams, find the cube first and then add (1).
Step 2
Why this answer is correct
The correct answer is C. (9). \(a_2=2^3+1=9\). In exams, find the cube first and then add (1).
Step 3
Exam Tip
\(a_2=2^3+1=9\) है। परीक्षा में पहले घन निकालें और फिर (1) जोड़ें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(2,9,28,65,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(2,9,28,65,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=n^2+1\)
B \(a_n=n^3+1\)
C \(a_n=2n+1\)
D \(a_n=3^n-1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=n^3+1\)
Step 1
Concept
The terms come from \(n^3+1\). In exams, check options using (n=1,2,3).
Step 2
Why this answer is correct
The correct answer is B. \(a_n=n^3+1\). The terms come from \(n^3+1\). In exams, check options using (n=1,2,3).
Step 3
Exam Tip
ये पद \(n^3+1\) से मिलते हैं। परीक्षा में (n=1,2,3) रखकर विकल्प जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=20-4n\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=20-4n\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (2)
B (4)
C (6)
D (8)
Explanation opens after your attempt
Step 1
Concept
\(a_4=20-16=4\). In exams, calculate (4n) and subtract it.
Step 2
Why this answer is correct
The correct answer is B. (4). \(a_4=20-16=4\). In exams, calculate (4n) and subtract it.
Step 3
Exam Tip
\(a_4=20-16=4\) है। परीक्षा में (4n) निकालकर उसे घटाएँ।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(16,12,8,4,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(16,12,8,4,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=16-4n\)
B \(a_n=20-4n\)
C \(a_n=4n\)
D \(a_n=12-n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=20-4n\)
Step 1
Concept
At (n=1) it gives (16), and at (n=2) it gives (12), so \(a_n=20-4n\). In exams, check the rule with the first term in a decreasing sequence.
Step 2
Why this answer is correct
The correct answer is B. \(a_n=20-4n\). At (n=1) it gives (16), and at (n=2) it gives (12), so \(a_n=20-4n\). In exams, check the rule with the first term in a decreasing sequence.
Step 3
Exam Tip
(n=1) पर (16) और (n=2) पर (12) मिलता है, इसलिए \(a_n=20-4n\) है। परीक्षा में घटते अनुक्रम में पहला पद मिलाकर नियम जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=7n+1\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=7n+1\), what is the value of \(a_5\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (34)
B (35)
C (36)
D (37)
Explanation opens after your attempt
Step 1
Concept
\(a_5=7\times5+1=36\). In exams, add the constant at the end.
Step 2
Why this answer is correct
The correct answer is C. (36). \(a_5=7\times5+1=36\). In exams, add the constant at the end.
Step 3
Exam Tip
\(a_5=7\times5+1=36\) है। परीक्षा में स्थिर संख्या को अंत में जोड़ें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(8,15,22,29,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(8,15,22,29,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=7n+1\)
B \(a_n=8n\)
C \(a_n=7n-1\)
D \(a_n=n+7\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=7n+1\)
Step 1
Concept
The first term is (8) and the difference is (7), so \(a_n=7n+1\). In exams, find the constant part from the first term.
Step 2
Why this answer is correct
The correct answer is A. \(a_n=7n+1\). The first term is (8) and the difference is (7), so \(a_n=7n+1\). In exams, find the constant part from the first term.
Step 3
Exam Tip
पहला पद (8) और अंतर (7) है, इसलिए \(a_n=7n+1\) है। परीक्षा में पहले पद से स्थिर भाग निकालें।
Login to save your score, XP, coins and progress. Login
यदि (a_n=\frac{n(n-1)}{2}) है, तो \(a_5\) का मान क्या होगा?
If (a_n=\frac{n(n-1)}{2}), what is the value of \(a_5\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (8)
B (10)
C (12)
D (15)
Explanation opens after your attempt
Step 1
Concept
\(a_5=\frac{5\times4}{2}=10\). In exams, multiply first and then divide by (2).
Step 2
Why this answer is correct
The correct answer is B. (10). \(a_5=\frac{5\times4}{2}=10\). In exams, multiply first and then divide by (2).
Step 3
Exam Tip
\(a_5=\frac{5\times4}{2}=10\) है। परीक्षा में पहले गुणन करें और फिर (2) से भाग दें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(0,1,3,6,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(0,1,3,6,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (a_n=\frac{n(n+1)}{2})
B (a_n=\frac{n(n-1)}{2})
C \(a_n=n^2-1\)
D \(a_n=n-1\)
Explanation opens after your attempt
Correct Answer
B. (a_n=\frac{n(n-1)}{2})
Step 1
Concept
Putting (n=1,2,3,4) gives (0,1,3,6). In exams, test triangular-number-like options with small (n).
Step 2
Why this answer is correct
The correct answer is B. (a_n=\frac{n(n-1)}{2}). Putting (n=1,2,3,4) gives (0,1,3,6). In exams, test triangular-number-like options with small (n).
Step 3
Exam Tip
(n=1,2,3,4) रखने पर (0,1,3,6) मिलते हैं। परीक्षा में त्रिभुज संख्या जैसे विकल्पों को छोटे (n) से जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=4n^2-1\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=4n^2-1\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (31)
B (33)
C (35)
D (37)
Explanation opens after your attempt
Step 1
Concept
\(a_3=4\times9-1=35\). In exams, square first and then multiply by (4).
Step 2
Why this answer is correct
The correct answer is C. (35). \(a_3=4\times9-1=35\). In exams, square first and then multiply by (4).
Step 3
Exam Tip
\(a_3=4\times9-1=35\) है। परीक्षा में वर्ग के बाद (4) से गुणा करें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(3,15,35,63,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(3,15,35,63,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=4n-1\)
B \(a_n=4n^2-1\)
C \(a_n=n^2+2\)
D \(a_n=3n^2\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=4n^2-1\)
Step 1
Concept
\(4n^2-1\) gives (3,15,35,63). In exams, substitute (n=1,2,3) and match.
Step 2
Why this answer is correct
The correct answer is B. \(a_n=4n^2-1\). \(4n^2-1\) gives (3,15,35,63). In exams, substitute (n=1,2,3) and match.
Step 3
Exam Tip
\(4n^2-1\) से (3,15,35,63) मिलते हैं। परीक्षा में (n=1,2,3) रखकर मिलान करें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=3n+7\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=3n+7\), what is the value of \(a_6\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (23)
B (25)
C (27)
D (29)
Explanation opens after your attempt
Step 1
Concept
\(a_6=3\times6+7=25\). In exams, put the given (n) directly into the formula.
Step 2
Why this answer is correct
The correct answer is B. (25). \(a_6=3\times6+7=25\). In exams, put the given (n) directly into the formula.
Step 3
Exam Tip
\(a_6=3\times6+7=25\) है। परीक्षा में दिए (n) को सीधे सूत्र में रखें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(10,13,16,19,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(10,13,16,19,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=10n\)
B \(a_n=3n+7\)
C \(a_n=3n-7\)
D \(a_n=n+9\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=3n+7\)
Step 1
Concept
The difference is (3) and the first term is (10), so \(a_n=3n+7\). In exams, check the rule on the first two terms.
Step 2
Why this answer is correct
The correct answer is B. \(a_n=3n+7\). The difference is (3) and the first term is (10), so \(a_n=3n+7\). In exams, check the rule on the first two terms.
Step 3
Exam Tip
अंतर (3) है और पहला पद (10) है, इसलिए \(a_n=3n+7\) है। परीक्षा में पहले दो पदों पर नियम जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=2^{n+1}\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=2^{n+1}\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (8)
B (12)
C (16)
D (32)
Explanation opens after your attempt
Step 1
Concept
\(a_3=2^4=16\). In exams, find the exponent (n+1) first.
Step 2
Why this answer is correct
The correct answer is C. (16). \(a_3=2^4=16\). In exams, find the exponent (n+1) first.
Step 3
Exam Tip
\(a_3=2^4=16\) है। परीक्षा में पहले घातांक (n+1) निकालें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(4,8,16,32,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(4,8,16,32,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=2n+2\)
B \(a_n=4n\)
C \(a_n=2^{n+1}\)
D \(a_n=2^n-1\)
Explanation opens after your attempt
Correct Answer
C. \(a_n=2^{n+1}\)
Step 1
Concept
Using \(2^{n+1}\) gives (4,8,16,32). In exams, match power options with the first term.
Step 2
Why this answer is correct
The correct answer is C. \(a_n=2^{n+1}\). Using \(2^{n+1}\) gives (4,8,16,32). In exams, match power options with the first term.
Step 3
Exam Tip
\(2^{n+1}\) रखने पर (4,8,16,32) मिलते हैं। परीक्षा में घात वाले विकल्पों को पहले पद से मिलाएँ।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=n^2+2n\) है, तो \(a_4\) का मान क्या होगा?
If \(a_n=n^2+2n\), what is the value of \(a_4\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (20)
B (22)
C (24)
D (26)
Explanation opens after your attempt
Step 1
Concept
\(a_4=16+8=24\). In exams, add both the square and (2n).
Step 2
Why this answer is correct
The correct answer is C. (24). \(a_4=16+8=24\). In exams, add both the square and (2n).
Step 3
Exam Tip
\(a_4=16+8=24\) है। परीक्षा में वर्ग और (2n) दोनों जोड़ें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(3,8,15,24,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(3,8,15,24,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=n^2+2n\)
B \(a_n=3n\)
C \(a_n=n^2+1\)
D \(a_n=2n^2\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=n^2+2n\)
Step 1
Concept
\(n^2+2n\) gives (3,8,15,24). In exams, test polynomial rules with small (n) values.
Step 2
Why this answer is correct
The correct answer is A. \(a_n=n^2+2n\). \(n^2+2n\) gives (3,8,15,24). In exams, test polynomial rules with small (n) values.
Step 3
Exam Tip
\(n^2+2n\) से (3,8,15,24) मिलते हैं। परीक्षा में बहुपद नियमों को छोटे (n) मानों से जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=50-5n\) है, तो \(a_7\) का मान क्या होगा?
If \(a_n=50-5n\), what is the value of \(a_7\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (10)
B (15)
C (20)
D (25)
Explanation opens after your attempt
Step 1
Concept
\(a_7=50-35=15\). In exams, subtract (5n) correctly.
Step 2
Why this answer is correct
The correct answer is B. (15). \(a_7=50-35=15\). In exams, subtract (5n) correctly.
Step 3
Exam Tip
\(a_7=50-35=15\) है। परीक्षा में (5n) को सही घटाएँ।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(45,40,35,30,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(45,40,35,30,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=45-5n\)
B \(a_n=50-5n\)
C \(a_n=5n+40\)
D \(a_n=40-n\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=50-5n\)
Step 1
Concept
At (n=1), it gives (45), and at (n=2), it gives (40), so \(a_n=50-5n\). In exams, always check (n=1) when forming a decreasing rule.
Step 2
Why this answer is correct
The correct answer is B. \(a_n=50-5n\). At (n=1), it gives (45), and at (n=2), it gives (40), so \(a_n=50-5n\). In exams, always check (n=1) when forming a decreasing rule.
Step 3
Exam Tip
(n=1) पर (45) और (n=2) पर (40) मिलता है, इसलिए \(a_n=50-5n\) है। परीक्षा में घटते समान अंतर का नियम बनाते समय (n=1) जरूर जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=6n-5\) है, तो कौन-सा पद (31) के बराबर होगा?
If \(a_n=6n-5\), which term will be equal to (31)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (n=4)
B (n=5)
C (n=6)
D (n=7)
Explanation opens after your attempt
Step 1
Concept
From (6n-5=31), we get (n=6). In exams, equate the given term to the formula and solve.
Step 2
Why this answer is correct
The correct answer is C. (n=6). From (6n-5=31), we get (n=6). In exams, equate the given term to the formula and solve.
Step 3
Exam Tip
(6n-5=31) से (n=6) मिलता है। परीक्षा में दिए पद को सूत्र के बराबर रखकर हल करें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(1,7,13,19,\ldots\) में (31) कौन-सा पद है?
In the sequence \(1,7,13,19,\ldots\), which term is (31)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A चौथा पद / (4)th term
B पाँचवाँ पद / (5)th term
C छठा पद / (6)th term
D सातवाँ पद / (7)th term
Explanation opens after your attempt
Correct Answer
C. छठा पद / (6)th term
Step 1
Concept
Its rule is \(a_n=6n-5\), and (6n-5=31) gives (n=6). In exams, form the general term to find the term number.
Step 2
Why this answer is correct
The correct answer is C. छठा पद / (6)th term. Its rule is \(a_n=6n-5\), and (6n-5=31) gives (n=6). In exams, form the general term to find the term number.
Step 3
Exam Tip
इसका नियम \(a_n=6n-5\) है और (6n-5=31) से (n=6) है। परीक्षा में सामान्य पद बनाकर पद संख्या निकालें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=\frac{n+1}{2}\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=\frac{n+1}{2}\), what is the value of \(a_5\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (2)
B (3)
C (4)
D (5)
Explanation opens after your attempt
Step 1
Concept
\(a_5=\frac{6}{2}=3\). In exams, simplify the numerator before dividing by the denominator.
Step 2
Why this answer is correct
The correct answer is B. (3). \(a_5=\frac{6}{2}=3\). In exams, simplify the numerator before dividing by the denominator.
Step 3
Exam Tip
\(a_5=\frac{6}{2}=3\) है। परीक्षा में पहले हर में जाने से पहले अंश को सरल करें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(1,\frac{3}{2},2,\frac{5}{2},\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(1,\frac{3}{2},2,\frac{5}{2},\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=\frac{n}{2}\)
B \(a_n=\frac{n+1}{2}\)
C \(a_n=n+1\)
D \(a_n=2n-1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=\frac{n+1}{2}\)
Step 1
Concept
\(\frac{n+1}{2}\) gives \(1,\frac{3}{2},2,\frac{5}{2}\). In exams, match fractional terms using small (n) values.
Step 2
Why this answer is correct
The correct answer is B. \(a_n=\frac{n+1}{2}\). \(\frac{n+1}{2}\) gives \(1,\frac{3}{2},2,\frac{5}{2}\). In exams, match fractional terms using small (n) values.
Step 3
Exam Tip
\(\frac{n+1}{2}\) से \(1,\frac{3}{2},2,\frac{5}{2}\) मिलते हैं। परीक्षा में भिन्न पदों को छोटे (n) मानों से मिलाएँ।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=10n+5\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=10n+5\), what is the value of \(a_2\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (15)
B (20)
C (25)
D (30)
Explanation opens after your attempt
Step 1
Concept
\(a_2=10\times2+5=25\). In exams, replace (n) with the term number.
Step 2
Why this answer is correct
The correct answer is C. (25). \(a_2=10\times2+5=25\). In exams, replace (n) with the term number.
Step 3
Exam Tip
\(a_2=10\times2+5=25\) है। परीक्षा में (n) की जगह पद संख्या रखें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(15,25,35,45,\ldots\) के लिए सही सामान्य पद कौन-सा है?
Which general term is correct for the sequence \(15,25,35,45,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=15n\)
B \(a_n=10n+5\)
C \(a_n=5n+10\)
D \(a_n=10n-5\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=10n+5\)
Step 1
Concept
The first term is (15) and the difference is (10), so \(a_n=10n+5\). In exams, use the difference as the coefficient and find the constant from the first term.
Step 2
Why this answer is correct
The correct answer is B. \(a_n=10n+5\). The first term is (15) and the difference is (10), so \(a_n=10n+5\). In exams, use the difference as the coefficient and find the constant from the first term.
Step 3
Exam Tip
पहला पद (15) और अंतर (10) है, इसलिए \(a_n=10n+5\) है। परीक्षा में अंतर को गुणांक और पहले पद से स्थिर भाग निकालें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=2n^2+1\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=2n^2+1\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (17)
B (19)
C (21)
D (23)
Explanation opens after your attempt
Step 1
Concept
\(a_3=2\times9+1=19\). In exams, square first, multiply by (2), and add (1).
Step 2
Why this answer is correct
The correct answer is B. (19). \(a_3=2\times9+1=19\). In exams, square first, multiply by (2), and add (1).
Step 3
Exam Tip
\(a_3=2\times9+1=19\) है। परीक्षा में वर्ग के बाद (2) से गुणा करें और (1) जोड़ें।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(3,9,19,33,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(3,9,19,33,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=2n^2+1\)
B \(a_n=3n\)
C \(a_n=n^2+2\)
D \(a_n=2^n+1\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=2n^2+1\)
Step 1
Concept
Using \(2n^2+1\) gives (3,9,19,33). In exams, match the square-based rule with the first four terms.
Step 2
Why this answer is correct
The correct answer is A. \(a_n=2n^2+1\). Using \(2n^2+1\) gives (3,9,19,33). In exams, match the square-based rule with the first four terms.
Step 3
Exam Tip
\(2n^2+1\) रखने पर (3,9,19,33) मिलते हैं। परीक्षा में वर्ग वाले नियम को पहले चार पदों से मिलाएँ।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=3^n-2\) है, तो \(a_3\) का मान क्या होगा?
If \(a_n=3^n-2\), what is the value of \(a_3\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (23)
B (24)
C (25)
D (27)
Explanation opens after your attempt
Step 1
Concept
\(a_3=3^3-2=25\). In exams, find the power first and then subtract (2).
Step 2
Why this answer is correct
The correct answer is C. (25). \(a_3=3^3-2=25\). In exams, find the power first and then subtract (2).
Step 3
Exam Tip
\(a_3=3^3-2=25\) है। परीक्षा में पहले घात निकालें और फिर (2) घटाएँ।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(1,7,25,79,\ldots\) के लिए सही स्पष्ट नियम कौन-सा है?
Which explicit rule is correct for the sequence \(1,7,25,79,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=3^n\)
B \(a_n=3^n-2\)
C \(a_n=2^n-1\)
D \(a_n=n^3-1\)
Explanation opens after your attempt
Correct Answer
B. \(a_n=3^n-2\)
Step 1
Concept
\(3^n-2\) gives (1,7,25,79). In exams, also check constant subtraction in power-based options.
Step 2
Why this answer is correct
The correct answer is B. \(a_n=3^n-2\). \(3^n-2\) gives (1,7,25,79). In exams, also check constant subtraction in power-based options.
Step 3
Exam Tip
\(3^n-2\) से (1,7,25,79) मिलते हैं। परीक्षा में घात वाले विकल्पों में स्थिर घटाव भी जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=n^2-2n\) है, तो \(a_6\) का मान क्या होगा?
If \(a_n=n^2-2n\), what is the value of \(a_6\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (18)
B (20)
C (22)
D (24)
Explanation opens after your attempt
Step 1
Concept
\(a_6=36-12=24\). In exams, subtract (2n) from the square.
Step 2
Why this answer is correct
The correct answer is D. (24). \(a_6=36-12=24\). In exams, subtract (2n) from the square.
Step 3
Exam Tip
\(a_6=36-12=24\) है। परीक्षा में वर्ग में से (2n) घटाएँ।
Login to save your score, XP, coins and progress. Login
अनुक्रम \(-1,0,3,8,\ldots\) का सामान्य पद क्या है?
What is the general term of the sequence \(-1,0,3,8,\ldots\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A \(a_n=n^2-2n\)
B \(a_n=n^2-1\)
C \(a_n=2n-3\)
D \(a_n=n^2+n\)
Explanation opens after your attempt
Correct Answer
A. \(a_n=n^2-2n\)
Step 1
Concept
\(n^2-2n\) gives (-1,0,3,8). In exams, keep testing options even when the first term is negative.
Step 2
Why this answer is correct
The correct answer is A. \(a_n=n^2-2n\). \(n^2-2n\) gives (-1,0,3,8). In exams, keep testing options even when the first term is negative.
Step 3
Exam Tip
\(n^2-2n\) से (-1,0,3,8) मिलते हैं। परीक्षा में ऋणात्मक पहला पद आने पर भी विकल्पों को जाँचें।
Login to save your score, XP, coins and progress. Login
यदि \(a_n=18+n\) है, तो \(a_5\) का मान क्या होगा?
If \(a_n=18+n\), what is the value of \(a_5\)?
#sequences
#progressions
#explicit-rule
#class-9
#easy
50 50-50 2 wrong hide
⏭ Skip Next question
+10 Time+ 10 sec extra
? Hint Small clue
A (21)
B (22)
C (23)
D (24)
Explanation opens after your attempt
Step 1
Concept
\(a_5=18+5=23\). In exams, substitute directly in simple addition formulas.
Step 2
Why this answer is correct
The correct answer is C. (23). \(a_5=18+5=23\). In exams, substitute directly in simple addition formulas.
Step 3
Exam Tip
\(a_5=18+5=23\) है। परीक्षा में सरल जोड़ वाले सूत्रों में सीधे प्रतिस्थापन करें।
Login to save your score, XP, coins and progress. Login
