Update
Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है • Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है • Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है
Subjects List

Class 9 Mathematics Medium Quiz

Mathematics Medium Class 9 Level 37

Level 37 • 50/50 questions • 35 seconds per question.

Level readiness 50/50 Questions
Time Left 29:10 35 sec/question
RewardsCoins + XP
ModeClassic Quiz
Previous Next Level
Share
Question 1 / 50 0 score
Answered 0/50 Correct 0 Time 29:10
Question 1/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

एक पौधे की ऊंचाई (H(t)=30+6t) सेमी है। (t=5) पर ऊंचाई क्या होगी?

A plant's height is (H(t)=30+6t) cm. What will be the height at (t=5)?

Explanation opens after your attempt
Correct Answer

C. (60) सेमी(60) cm

Step 1

Concept

(H(5)=30+6(5)=60). After substituting the variable value, multiply first.

Step 2

Why this answer is correct

The correct answer is C. (60) सेमी / (60) cm. (H(5)=30+6(5)=60). After substituting the variable value, multiply first.

Step 3

Exam Tip

(H(5)=30+6(5)=60) है। चर का मान रखने के बाद पहले गुणा करें।

Open Question Page
Ask Friends
Question 2/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

एक टंकी में पानी (W(t)=180-12t) लीटर बचता है। (t=9) पर पानी कितना बचेगा?

Water left in a tank is (W(t)=180-12t) litres. How much water will remain at (t=9)?

Explanation opens after your attempt
Correct Answer

A. (72) लीटर(72) litres

Step 1

Concept

(W(9)=180-12(9)=72). In decay, subtract the total decrease from the initial value.

Step 2

Why this answer is correct

The correct answer is A. (72) लीटर / (72) litres. (W(9)=180-12(9)=72). In decay, subtract the total decrease from the initial value.

Step 3

Exam Tip

(W(9)=180-12(9)=72) है। क्षय में कुल कमी को आरंभिक मान से घटाएं।

Open Question Page
Ask Friends
Question 3/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (P(n)=55+8n), तो (P(7)-P(2)) का मान क्या है?

If (P(n)=55+8n), what is the value of (P(7)-P(2))?

Explanation opens after your attempt
Correct Answer

C. (40)

Step 1

Concept

There are (7-2=5) steps and the increase per step is (8). So the difference is \(8\times5=40\).

Step 2

Why this answer is correct

The correct answer is C. (40). There are (7-2=5) steps and the increase per step is (8). So the difference is \(8\times5=40\).

Step 3

Exam Tip

(7-2=5) चरण हैं और प्रति चरण वृद्धि (8) है। इसलिए अंतर \(8\times5=40\) है।

Open Question Page
Ask Friends
Question 4/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (Q(t)=160-7t), तो (Q(4)-Q(10)) का मान क्या है?

If (Q(t)=160-7t), what is the value of (Q(4)-Q(10))?

Explanation opens after your attempt
Correct Answer

C. (42)

Step 1

Concept

There are (10-4=6) steps and the decay rate is (7). So the difference is \(7\times6=42\).

Step 2

Why this answer is correct

The correct answer is C. (42). There are (10-4=6) steps and the decay rate is (7). So the difference is \(7\times6=42\).

Step 3

Exam Tip

(10-4=6) चरण हैं और कमी दर (7) है। इसलिए अंतर \(7\times6=42\) है।

Open Question Page
Ask Friends
Question 5/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

बचत राशि (S(m)=400+60m) रुपये है। राशि (760) रुपये कितने महीनों बाद होगी?

The saving amount is (S(m)=400+60m) rupees. After how many months will the amount be (760) rupees?

Explanation opens after your attempt
Correct Answer

C. (6)

Step 1

Concept

From (400+60m=760), (60m=360) and (m=6). Set the target value equal to the model.

Step 2

Why this answer is correct

The correct answer is C. (6). From (400+60m=760), (60m=360) and (m=6). Set the target value equal to the model.

Step 3

Exam Tip

(400+60m=760) से (60m=360) और (m=6) मिलता है। लक्ष्य मान को मॉडल के बराबर रखें।

Open Question Page
Ask Friends
Question 6/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

बैटरी (B(h)=120-10h) प्रतिशत मॉडल से घटती है। बैटरी (50%) कब होगी?

A battery decreases by the model (B(h)=120-10h) percent. When will the battery be (50%)?

Explanation opens after your attempt
Correct Answer

C. (h=7)

Step 1

Concept

From (120-10h=50), (10h=70) and (h=7). Solve the decreasing model carefully.

Step 2

Why this answer is correct

The correct answer is C. (h=7). From (120-10h=50), (10h=70) and (h=7). Solve the decreasing model carefully.

Step 3

Exam Tip

(120-10h=50) से (10h=70) और (h=7) है। क्षय में घटे हुए मान को सावधानी से हल करें।

Open Question Page
Ask Friends
Question 7/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

किस नियम में आरंभिक मान (42) और प्रति चरण (5) की वृद्धि है?

Which rule has initial value (42) and growth of (5) per step?

Explanation opens after your attempt
Correct Answer

C. (y=42+5x)

Step 1

Concept

The initial value is the constant (42) and the growth rate is (5). So (y=42+5x) is correct.

Step 2

Why this answer is correct

The correct answer is C. (y=42+5x). The initial value is the constant (42) and the growth rate is (5). So (y=42+5x) is correct.

Step 3

Exam Tip

आरंभिक मान नियतांक (42) है और वृद्धि दर (5) है। इसलिए (y=42+5x) सही है।

Open Question Page
Ask Friends
Question 8/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

किस नियम में आरंभिक मान (210) और प्रति चरण (14) की कमी है?

Which rule has initial value (210) and decrease of (14) per step?

Explanation opens after your attempt
Correct Answer

D. (y=210-14x)

Step 1

Concept

For decrease, the coefficient of (x) must be negative. So (y=210-14x) is the correct model.

Step 2

Why this answer is correct

The correct answer is D. (y=210-14x). For decrease, the coefficient of (x) must be negative. So (y=210-14x) is the correct model.

Step 3

Exam Tip

कमी के लिए (x) का गुणांक ऋणात्मक होगा। इसलिए (y=210-14x) सही मॉडल है।

Open Question Page
Ask Friends
Question 9/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=28+9x) और (x) (2) से (8) हो जाए, तो (y) में कुल वृद्धि कितनी होगी?

If (y=28+9x) and (x) changes from (2) to (8), what is the total increase in (y)?

Explanation opens after your attempt
Correct Answer

C. (54)

Step 1

Concept

The change in (x) is (8-2=6) and the rate is (9). Total increase is \(9\times6=54\).

Step 2

Why this answer is correct

The correct answer is C. (54). The change in (x) is (8-2=6) and the rate is (9). Total increase is \(9\times6=54\).

Step 3

Exam Tip

(x) में परिवर्तन (8-2=6) है और दर (9) है। कुल वृद्धि \(9\times6=54\) है।

Open Question Page
Ask Friends
Question 10/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=125-6x) और (x) (3) से (11) हो जाए, तो (y) में कुल कमी कितनी होगी?

If (y=125-6x) and (x) changes from (3) to (11), what is the total decrease in (y)?

Explanation opens after your attempt
Correct Answer

C. (48)

Step 1

Concept

The change in (x) is (11-3=8) and the decrease rate is (6). Total decrease is \(6\times8=48\).

Step 2

Why this answer is correct

The correct answer is C. (48). The change in (x) is (11-3=8) and the decrease rate is (6). Total decrease is \(6\times8=48\).

Step 3

Exam Tip

(x) में परिवर्तन (11-3=8) है और कमी दर (6) है। कुल कमी \(6\times8=48\) है।

Open Question Page
Ask Friends
Question 11/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (A(t)=a+9t) और (A(3)=57), तो (a) क्या है?

If (A(t)=a+9t) and (A(3)=57), what is (a)?

Explanation opens after your attempt
Correct Answer

C. (30)

Step 1

Concept

From (a+9(3)=57), (a+27=57) and (a=30). Form an equation for the unknown initial value.

Step 2

Why this answer is correct

The correct answer is C. (30). From (a+9(3)=57), (a+27=57) and (a=30). Form an equation for the unknown initial value.

Step 3

Exam Tip

(a+9(3)=57) से (a+27=57) और (a=30) है। अज्ञात आरंभिक मान के लिए समीकरण बनाएं।

Open Question Page
Ask Friends
Question 12/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (R(t)=b-11t) और (R(4)=76), तो (b) क्या है?

If (R(t)=b-11t) and (R(4)=76), what is (b)?

Explanation opens after your attempt
Correct Answer

D. (120)

Step 1

Concept

From (b-11(4)=76), (b-44=76) and (b=120). In decay, add back the decreased amount.

Step 2

Why this answer is correct

The correct answer is D. (120). From (b-11(4)=76), (b-44=76) and (b=120). In decay, add back the decreased amount.

Step 3

Exam Tip

(b-11(4)=76) से (b-44=76) और (b=120) है। क्षय में घटाई गई मात्रा वापस जोड़ें।

Open Question Page
Ask Friends
Question 13/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

एक दुकान की बिक्री (V(d)=650+45d) रुपये है। (d=2) और (d=8) के बीच वृद्धि कितनी है?

A shop's sales are (V(d)=650+45d) rupees. What is the increase between (d=2) and (d=8)?

Explanation opens after your attempt
Correct Answer

C. (270) रुपये(270) rupees

Step 1

Concept

The day difference is (8-2=6) and the rate is (45). The increase is \(45\times6=270\) rupees.

Step 2

Why this answer is correct

The correct answer is C. (270) रुपये / (270) rupees. The day difference is (8-2=6) and the rate is (45). The increase is \(45\times6=270\) rupees.

Step 3

Exam Tip

दिनों का अंतर (8-2=6) है और दर (45) है। वृद्धि \(45\times6=270\) रुपये है।

Open Question Page
Ask Friends
Question 14/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

एक मोमबत्ती की लंबाई (L(h)=48-4h) सेमी है। (h=3) और (h=9) के बीच लंबाई कितनी घटेगी?

A candle's length is (L(h)=48-4h) cm. How much will the length decrease between (h=3) and (h=9)?

Explanation opens after your attempt
Correct Answer

C. (24) सेमी(24) cm

Step 1

Concept

The time difference is (9-3=6) and the decrease rate is (4). Total decrease is \(4\times6=24\) cm.

Step 2

Why this answer is correct

The correct answer is C. (24) सेमी / (24) cm. The time difference is (9-3=6) and the decrease rate is (4). Total decrease is \(4\times6=24\) cm.

Step 3

Exam Tip

समय का अंतर (9-3=6) है और कमी दर (4) है। कुल कमी \(4\times6=24\) सेमी है।

Open Question Page
Ask Friends
Question 15/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

कौन सा नियम रेखीय वृद्धि है और आरंभिक मान (24) भी रखता है?

Which rule is linear growth and also has initial value (24)?

Explanation opens after your attempt
Correct Answer

C. (y=24+7x)

Step 1

Concept

Linear growth needs a positive rate and initial value (24). (y=24+7x) satisfies both conditions.

Step 2

Why this answer is correct

The correct answer is C. (y=24+7x). Linear growth needs a positive rate and initial value (24). (y=24+7x) satisfies both conditions.

Step 3

Exam Tip

रेखीय वृद्धि के लिए दर धनात्मक और आरंभिक मान (24) चाहिए। (y=24+7x) दोनों शर्तें पूरी करता है।

Open Question Page
Ask Friends
Question 16/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

कौन सा नियम रेखीय क्षय है और आरंभिक मान (150) भी रखता है?

Which rule is linear decay and also has initial value (150)?

Explanation opens after your attempt
Correct Answer

A. (y=150-12x)

Step 1

Concept

Linear decay needs a negative rate and initial value (150). (y=150-12x) is correct.

Step 2

Why this answer is correct

The correct answer is A. (y=150-12x). Linear decay needs a negative rate and initial value (150). (y=150-12x) is correct.

Step 3

Exam Tip

रेखीय क्षय के लिए दर ऋणात्मक और आरंभिक मान (150) चाहिए। (y=150-12x) सही है।

Open Question Page
Ask Friends
Question 17/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (M(t)=m+8t) और (M(2)=44), तो (M(7)) क्या होगा?

If (M(t)=m+8t) and (M(2)=44), what will (M(7)) be?

Explanation opens after your attempt
Correct Answer

C. (84)

Step 1

Concept

First (m+16=44) gives (m=28). Then (M(7)=28+56=84).

Step 2

Why this answer is correct

The correct answer is C. (84). First (m+16=44) gives (m=28). Then (M(7)=28+56=84).

Step 3

Exam Tip

पहले (m+16=44) से (m=28) है। फिर (M(7)=28+56=84) है।

Open Question Page
Ask Friends
Question 18/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (N(t)=n-6t) और (N(5)=70), तो (N(12)) क्या होगा?

If (N(t)=n-6t) and (N(5)=70), what will (N(12)) be?

Explanation opens after your attempt
Correct Answer

A. (28)

Step 1

Concept

First (n-30=70) gives (n=100). Then (N(12)=100-72=28).

Step 2

Why this answer is correct

The correct answer is A. (28). First (n-30=70) gives (n=100). Then (N(12)=100-72=28).

Step 3

Exam Tip

पहले (n-30=70) से (n=100) है। फिर (N(12)=100-72=28) है।

Open Question Page
Ask Friends
Question 19/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=45+kx) और (x=6) पर (y=81), तो (k) क्या है?

If (y=45+kx) and (y=81) at (x=6), what is (k)?

Explanation opens after your attempt
Correct Answer

B. (6)

Step 1

Concept

From (45+6k=81), (6k=36) and (k=6). The coefficient represents the rate.

Step 2

Why this answer is correct

The correct answer is B. (6). From (45+6k=81), (6k=36) and (k=6). The coefficient represents the rate.

Step 3

Exam Tip

(45+6k=81) से (6k=36) और (k=6) है। गुणांक दर को बताता है।

Open Question Page
Ask Friends
Question 20/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=200-kx) और (x=8) पर (y=136), तो (k) क्या है?

If (y=200-kx) and (y=136) at (x=8), what is (k)?

Explanation opens after your attempt
Correct Answer

B. (8)

Step 1

Concept

From (200-8k=136), (8k=64) and (k=8). The decay rate magnitude is (8).

Step 2

Why this answer is correct

The correct answer is B. (8). From (200-8k=136), (8k=64) and (k=8). The decay rate magnitude is (8).

Step 3

Exam Tip

(200-8k=136) से (8k=64) और (k=8) मिलता है। क्षय दर का परिमाण (8) है।

Open Question Page
Ask Friends
Question 21/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

दो मॉडल (A(t)=20+5t) और (B(t)=50+2t) हैं। (t=7) पर कौन सा मान बड़ा है?

Two models are (A(t)=20+5t) and (B(t)=50+2t). Which value is greater at (t=7)?

Explanation opens after your attempt
Correct Answer

B. (B(t)) बड़ा है(B(t)) is greater

Step 1

Concept

(A(7)=55) and (B(7)=64). Therefore (B(t)) is greater.

Step 2

Why this answer is correct

The correct answer is B. (B(t)) बड़ा है / (B(t)) is greater. (A(7)=55) and (B(7)=64). Therefore (B(t)) is greater.

Step 3

Exam Tip

(A(7)=55) और (B(7)=64) है। इसलिए (B(t)) बड़ा है।

Open Question Page
Ask Friends
Question 22/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

दो मॉडल (C(t)=140-8t) और (D(t)=110-3t) हैं। (t=6) पर सही तुलना क्या है?

Two models are (C(t)=140-8t) and (D(t)=110-3t). What is the correct comparison at (t=6)?

Explanation opens after your attempt
Correct Answer

C. (C(6)=D(6))

Step 1

Concept

(C(6)=92) and (D(6)=92). Therefore both are equal.

Step 2

Why this answer is correct

The correct answer is C. (C(6)=D(6)). (C(6)=92) and (D(6)=92). Therefore both are equal.

Step 3

Exam Tip

(C(6)=92) और (D(6)=92) हैं। इसलिए दोनों बराबर हैं।

Open Question Page
Ask Friends
Question 23/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (T(t)=54+6t), तो (T(t)=102) कब होगा?

If (T(t)=54+6t), when will (T(t)=102)?

Explanation opens after your attempt
Correct Answer

C. (t=8)

Step 1

Concept

From (54+6t=102), (6t=48) and (t=8). Solve the equation for the target value.

Step 2

Why this answer is correct

The correct answer is C. (t=8). From (54+6t=102), (6t=48) and (t=8). Solve the equation for the target value.

Step 3

Exam Tip

(54+6t=102) से (6t=48) और (t=8) है। लक्ष्य मान के लिए समीकरण हल करें।

Open Question Page
Ask Friends
Question 24/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (U(t)=150-15t), तो (U(t)=45) कब होगा?

If (U(t)=150-15t), when will (U(t)=45)?

Explanation opens after your attempt
Correct Answer

C. (t=7)

Step 1

Concept

From (150-15t=45), (15t=105) and (t=7). Move the subtraction term correctly in decay.

Step 2

Why this answer is correct

The correct answer is C. (t=7). From (150-15t=45), (15t=105) and (t=7). Move the subtraction term correctly in decay.

Step 3

Exam Tip

(150-15t=45) से (15t=105) और (t=7) है। क्षय में घटाव को सही दिशा में ले जाएं।

Open Question Page
Ask Friends
Question 25/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (f(x)=25+6x), तो (f(x+4)-f(x)) का मान क्या है?

If (f(x)=25+6x), what is the value of (f(x+4)-f(x))?

Explanation opens after your attempt
Correct Answer

C. (24)

Step 1

Concept

When (x) increases by (4), rate (6) gives increase (24). So the difference is (24).

Step 2

Why this answer is correct

The correct answer is C. (24). When (x) increases by (4), rate (6) gives increase (24). So the difference is (24).

Step 3

Exam Tip

(x) में (4) की वृद्धि पर दर (6) के कारण वृद्धि (24) होती है। इसलिए अंतर (24) है।

Open Question Page
Ask Friends
Question 26/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (g(x)=120-9x), तो (g(x)-g(x+5)) का मान क्या है?

If (g(x)=120-9x), what is the value of (g(x)-g(x+5))?

Explanation opens after your attempt
Correct Answer

C. (45)

Step 1

Concept

When (x) increases by (5), the value decreases by \(9\times5=45\). So (g(x)-g(x+5)=45).

Step 2

Why this answer is correct

The correct answer is C. (45). When (x) increases by (5), the value decreases by \(9\times5=45\). So (g(x)-g(x+5)=45).

Step 3

Exam Tip

(x) में (5) की वृद्धि पर मान \(9\times5=45\) घटता है। इसलिए (g(x)-g(x+5)=45) है।

Open Question Page
Ask Friends
Question 27/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

किस विकल्प में (x) बढ़ने पर (y) हर बार (7) बढ़ता है और (y(0)=18) है?

Which option has (y) increasing by (7) each time (x) increases and (y(0)=18)?

Explanation opens after your attempt
Correct Answer

B. (y=18+7x)

Step 1

Concept

For (y(0)=18), the constant must be (18), and the growth rate must be (7). So (y=18+7x).

Step 2

Why this answer is correct

The correct answer is B. (y=18+7x). For (y(0)=18), the constant must be (18), and the growth rate must be (7). So (y=18+7x).

Step 3

Exam Tip

(y(0)=18) के लिए नियतांक (18) चाहिए और वृद्धि दर (7) चाहिए। इसलिए (y=18+7x) है।

Open Question Page
Ask Friends
Question 28/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

किस विकल्प में (x) बढ़ने पर (y) हर बार (8) घटता है और (y(0)=130) है?

Which option has (y) decreasing by (8) each time (x) increases and (y(0)=130)?

Explanation opens after your attempt
Correct Answer

C. (y=130-8x)

Step 1

Concept

The initial value must be (130) and the rate must be (-8). Therefore (y=130-8x) is correct.

Step 2

Why this answer is correct

The correct answer is C. (y=130-8x). The initial value must be (130) and the rate must be (-8). Therefore (y=130-8x) is correct.

Step 3

Exam Tip

आरंभिक मान (130) और दर (-8) चाहिए। इसलिए (y=130-8x) सही है।

Open Question Page
Ask Friends
Question 29/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=70+4x), तो (x=12) पर (y) और (x=5) पर (y) में अंतर क्या है?

If (y=70+4x), what is the difference between (y) at (x=12) and (y) at (x=5)?

Explanation opens after your attempt
Correct Answer

B. (28)

Step 1

Concept

The difference in (x) is (12-5=7) and the rate is (4). So the difference is \(4\times7=28\).

Step 2

Why this answer is correct

The correct answer is B. (28). The difference in (x) is (12-5=7) and the rate is (4). So the difference is \(4\times7=28\).

Step 3

Exam Tip

(x) का अंतर (12-5=7) है और दर (4) है। इसलिए अंतर \(4\times7=28\) है।

Open Question Page
Ask Friends
Question 30/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=170-10x), तो (x=4) पर (y) और (x=11) पर (y) में अंतर कितना है?

If (y=170-10x), what is the difference between (y) at (x=4) and (y) at (x=11)?

Explanation opens after your attempt
Correct Answer

C. (70)

Step 1

Concept

The difference in (x) is (11-4=7) and the decay rate is (10). So the difference is (70).

Step 2

Why this answer is correct

The correct answer is C. (70). The difference in (x) is (11-4=7) and the decay rate is (10). So the difference is (70).

Step 3

Exam Tip

(x) का अंतर (11-4=7) है और कमी दर (10) है। इसलिए अंतर (70) है।

Open Question Page
Ask Friends
Question 31/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

एक डेटा प्लान में डेटा (D(d)=4+1.5d) जीबी है। (d=8) पर कुल डेटा क्या होगा?

In a data plan, data is (D(d)=4+1.5d) GB. What will be the total data at (d=8)?

Explanation opens after your attempt
Correct Answer

C. (16) जीबी(16) GB

Step 1

Concept

(D(8)=4+1.5(8)=16). Multiply the decimal rate like a normal rate.

Step 2

Why this answer is correct

The correct answer is C. (16) जीबी / (16) GB. (D(8)=4+1.5(8)=16). Multiply the decimal rate like a normal rate.

Step 3

Exam Tip

(D(8)=4+1.5(8)=16) है। दशमलव दर को सामान्य दर की तरह गुणा करें।

Open Question Page
Ask Friends
Question 32/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

तापमान मॉडल (T(h)=44-2.5h) है। (h=10) पर तापमान क्या होगा?

The temperature model is (T(h)=44-2.5h). What will the temperature be at (h=10)?

Explanation opens after your attempt
Correct Answer

C. (19)

Step 1

Concept

(T(10)=44-2.5(10)=19). Subtract the decimal decrease directly too.

Step 2

Why this answer is correct

The correct answer is C. (19). (T(10)=44-2.5(10)=19). Subtract the decimal decrease directly too.

Step 3

Exam Tip

(T(10)=44-2.5(10)=19) है। दशमलव कमी को भी सीधे घटाएं।

Open Question Page
Ask Friends
Question 33/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=9+3.5x), तो (x=6) पर (y) क्या है?

If (y=9+3.5x), what is (y) at (x=6)?

Explanation opens after your attempt
Correct Answer

C. (30)

Step 1

Concept

(y=9+3.5(6)=30). Use the decimal coefficient like a normal coefficient.

Step 2

Why this answer is correct

The correct answer is C. (30). (y=9+3.5(6)=30). Use the decimal coefficient like a normal coefficient.

Step 3

Exam Tip

(y=9+3.5(6)=30) है। दशमलव गुणांक को सामान्य गुणांक की तरह इस्तेमाल करें।

Open Question Page
Ask Friends
Question 34/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=75-4.5x), तो (x=10) पर (y) क्या है?

If (y=75-4.5x), what is (y) at (x=10)?

Explanation opens after your attempt
Correct Answer

C. (30)

Step 1

Concept

(y=75-4.5(10)=30). Multiply first and then subtract.

Step 2

Why this answer is correct

The correct answer is C. (30). (y=75-4.5(10)=30). Multiply first and then subtract.

Step 3

Exam Tip

(y=75-4.5(10)=30) है। पहले गुणा करें फिर घटाएं।

Open Question Page
Ask Friends
Question 35/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=32+kx) रेखीय वृद्धि है और (k=0), तो कथन के बारे में क्या सही है?

If (y=32+kx) is linear growth and (k=0), what is correct about the statement?

Explanation opens after your attempt
Correct Answer

A. यह वृद्धि नहीं हैIt is not growth

Step 1

Concept

When (k=0), (y=32) remains constant. For growth, (k>0) is needed.

Step 2

Why this answer is correct

The correct answer is A. यह वृद्धि नहीं है / It is not growth. When (k=0), (y=32) remains constant. For growth, (k>0) is needed.

Step 3

Exam Tip

(k=0) होने पर (y=32) स्थिर रहता है। वृद्धि के लिए (k>0) चाहिए।

Open Question Page
Ask Friends
Question 36/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=140-kx) रेखीय क्षय है और (k=0), तो कथन के बारे में क्या सही है?

If (y=140-kx) is linear decay and (k=0), what is correct about the statement?

Explanation opens after your attempt
Correct Answer

A. यह क्षय नहीं हैIt is not decay

Step 1

Concept

When (k=0), (y=140) remains constant. Decay needs an effective negative rate.

Step 2

Why this answer is correct

The correct answer is A. यह क्षय नहीं है / It is not decay. When (k=0), (y=140) remains constant. Decay needs an effective negative rate.

Step 3

Exam Tip

(k=0) होने पर (y=140) स्थिर रहता है। क्षय के लिए प्रभावी ऋणात्मक दर चाहिए।

Open Question Page
Ask Friends
Question 37/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

एक क्लब में सदस्य (M(w)=60+4w) हैं। कितने सप्ताह बाद सदस्य (100) होंगे?

Members in a club are (M(w)=60+4w). After how many weeks will the members be (100)?

Explanation opens after your attempt
Correct Answer

C. (w=10)

Step 1

Concept

From (60+4w=100), (4w=40) and (w=10). Form an equation for the target number.

Step 2

Why this answer is correct

The correct answer is C. (w=10). From (60+4w=100), (4w=40) and (w=10). Form an equation for the target number.

Step 3

Exam Tip

(60+4w=100) से (4w=40) और (w=10) है। लक्ष्य संख्या के लिए समीकरण बनाएं।

Open Question Page
Ask Friends
Question 38/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

एक गोदाम में सामान (I(d)=300-20d) बचता है। कब सामान (120) बचेगा?

Items left in a warehouse are (I(d)=300-20d). When will (120) items be left?

Explanation opens after your attempt
Correct Answer

C. (d=9)

Step 1

Concept

From (300-20d=120), (20d=180) and (d=9). Set the remaining amount equal to the target.

Step 2

Why this answer is correct

The correct answer is C. (d=9). From (300-20d=120), (20d=180) and (d=9). Set the remaining amount equal to the target.

Step 3

Exam Tip

(300-20d=120) से (20d=180) और (d=9) है। बची मात्रा को लक्ष्य के बराबर रखें।

Open Question Page
Ask Friends
Question 39/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (f(x)=6x+11), तो (f(4)+f(8)) का मान क्या है?

If (f(x)=6x+11), what is the value of (f(4)+f(8))?

Explanation opens after your attempt
Correct Answer

B. (94)

Step 1

Concept

(f(4)=35) and (f(8)=59). Adding gives (94).

Step 2

Why this answer is correct

The correct answer is B. (94). (f(4)=35) and (f(8)=59). Adding gives (94).

Step 3

Exam Tip

(f(4)=35) और (f(8)=59) हैं। जोड़ने पर (94) मिलता है।

Open Question Page
Ask Friends
Question 40/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (g(x)=90-4x), तो (g(5)+g(12)) का मान क्या है?

If (g(x)=90-4x), what is the value of (g(5)+g(12))?

Explanation opens after your attempt
Correct Answer

C. (112)

Step 1

Concept

(g(5)=70) and (g(12)=42). Adding gives (112).

Step 2

Why this answer is correct

The correct answer is C. (112). (g(5)=70) and (g(12)=42). Adding gives (112).

Step 3

Exam Tip

(g(5)=70) और (g(12)=42) हैं। जोड़ने पर (112) मिलता है।

Open Question Page
Ask Friends
Question 41/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (A(x)=24+7x) और (B(x)=48+4x), तो दोनों कब बराबर होंगे?

If (A(x)=24+7x) and (B(x)=48+4x), when will both be equal?

Explanation opens after your attempt
Correct Answer

B. (x=8)

Step 1

Concept

From (24+7x=48+4x), (3x=24) and (x=8). Set both models equal for equality.

Step 2

Why this answer is correct

The correct answer is B. (x=8). From (24+7x=48+4x), (3x=24) and (x=8). Set both models equal for equality.

Step 3

Exam Tip

(24+7x=48+4x) से (3x=24) और (x=8) है। बराबरी के लिए दोनों मॉडल बराबर रखें।

Open Question Page
Ask Friends
Question 42/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (C(x)=180-9x) और (D(x)=120-3x), तो दोनों कब बराबर होंगे?

If (C(x)=180-9x) and (D(x)=120-3x), when will both be equal?

Explanation opens after your attempt
Correct Answer

B. (x=10)

Step 1

Concept

From (180-9x=120-3x), (60=6x) and (x=10). Equating both decay models gives the time.

Step 2

Why this answer is correct

The correct answer is B. (x=10). From (180-9x=120-3x), (60=6x) and (x=10). Equating both decay models gives the time.

Step 3

Exam Tip

(180-9x=120-3x) से (60=6x) और (x=10) है। दोनों क्षय मॉडल बराबर करने से समय मिलता है।

Open Question Page
Ask Friends
Question 43/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=36+8x), तो (x) का कौन सा मान (y=100) देता है?

If (y=36+8x), which value of (x) gives (y=100)?

Explanation opens after your attempt
Correct Answer

C. (8)

Step 1

Concept

From (36+8x=100), (8x=64) and (x=8). Substitute the target value and solve.

Step 2

Why this answer is correct

The correct answer is C. (8). From (36+8x=100), (8x=64) and (x=8). Substitute the target value and solve.

Step 3

Exam Tip

(36+8x=100) से (8x=64) और (x=8) है। लक्ष्य मान रखकर हल करें।

Open Question Page
Ask Friends
Question 44/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=165-12x), तो (x) का कौन सा मान (y=45) देता है?

If (y=165-12x), which value of (x) gives (y=45)?

Explanation opens after your attempt
Correct Answer

C. (10)

Step 1

Concept

From (165-12x=45), (12x=120) and (x=10). Pay attention to signs in a decay equation.

Step 2

Why this answer is correct

The correct answer is C. (10). From (165-12x=45), (12x=120) and (x=10). Pay attention to signs in a decay equation.

Step 3

Exam Tip

(165-12x=45) से (12x=120) और (x=10) है। क्षय समीकरण में चिन्ह का ध्यान रखें।

Open Question Page
Ask Friends
Question 45/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=5x+60), तो (x) (4) से (14) तक बढ़ने पर (y) में क्या होगा?

If (y=5x+60), what happens to (y) when (x) increases from (4) to (14)?

Explanation opens after your attempt
Correct Answer

B. (50) बढ़ेगाIt increases by (50)

Step 1

Concept

The change in (x) is (10) and the rate is (5). So (y) increases by (50).

Step 2

Why this answer is correct

The correct answer is B. (50) बढ़ेगा / It increases by (50). The change in (x) is (10) and the rate is (5). So (y) increases by (50).

Step 3

Exam Tip

(x) में परिवर्तन (10) है और दर (5) है। इसलिए (y) (50) बढ़ेगा।

Open Question Page
Ask Friends
Question 46/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=240-11x), तो (x) (3) से (13) तक बढ़ने पर (y) में क्या होगा?

If (y=240-11x), what happens to (y) when (x) increases from (3) to (13)?

Explanation opens after your attempt
Correct Answer

C. (110) घटेगाIt decreases by (110)

Step 1

Concept

The change in (x) is (10) and the decay rate is (11). So (y) decreases by (110).

Step 2

Why this answer is correct

The correct answer is C. (110) घटेगा / It decreases by (110). The change in (x) is (10) and the decay rate is (11). So (y) decreases by (110).

Step 3

Exam Tip

(x) में परिवर्तन (10) है और कमी दर (11) है। इसलिए (y) (110) घटेगा।

Open Question Page
Ask Friends
Question 47/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (F(t)=26+rt) और (F(4)=58), तो (F(9)) क्या है?

If (F(t)=26+rt) and (F(4)=58), what is (F(9))?

Explanation opens after your attempt
Correct Answer

C. (98)

Step 1

Concept

From (26+4r=58), (r=8). Therefore (F(9)=26+72=98).

Step 2

Why this answer is correct

The correct answer is C. (98). From (26+4r=58), (r=8). Therefore (F(9)=26+72=98).

Step 3

Exam Tip

(26+4r=58) से (r=8) है। इसलिए (F(9)=26+72=98) है।

Open Question Page
Ask Friends
Question 48/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (G(t)=q-7t) और (G(3)=99), तो (G(10)) क्या है?

If (G(t)=q-7t) and (G(3)=99), what is (G(10))?

Explanation opens after your attempt
Correct Answer

B. (50)

Step 1

Concept

From (q-21=99), (q=120). Therefore (G(10)=120-70=50).

Step 2

Why this answer is correct

The correct answer is B. (50). From (q-21=99), (q=120). Therefore (G(10)=120-70=50).

Step 3

Exam Tip

(q-21=99) से (q=120) है। इसलिए (G(10)=120-70=50) है।

Open Question Page
Ask Friends
Question 49/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=44+10x), तो (x=2) से (x=7) तक (y) में कुल वृद्धि कितनी होगी?

If (y=44+10x), what will be the total increase in (y) from (x=2) to (x=7)?

Explanation opens after your attempt
Correct Answer

B. (50)

Step 1

Concept

The change in (x) is (7-2=5) and the growth rate is (10). Therefore the total increase is \(10\times5=50\).

Step 2

Why this answer is correct

The correct answer is B. (50). The change in (x) is (7-2=5) and the growth rate is (10). Therefore the total increase is \(10\times5=50\).

Step 3

Exam Tip

(x) में परिवर्तन (7-2=5) है और वृद्धि दर (10) है। इसलिए कुल वृद्धि \(10\times5=50\) है।

Open Question Page
Ask Friends
Question 50/50 Medium Mathematics Introduction to Polynomials Linear growth and decay Class 9 Level 37

यदि (y=220-13x), तो (x=4) से (x=9) तक (y) में कुल कमी कितनी होगी?

If (y=220-13x), what will be the total decrease in (y) from (x=4) to (x=9)?

Explanation opens after your attempt
Correct Answer

B. (65)

Step 1

Concept

The change in (x) is (9-4=5) and the decay rate is (13). Therefore the total decrease is \(13\times5=65\).

Step 2

Why this answer is correct

The correct answer is B. (65). The change in (x) is (9-4=5) and the decay rate is (13). Therefore the total decrease is \(13\times5=65\).

Step 3

Exam Tip

(x) में परिवर्तन (9-4=5) है और कमी दर (13) है। इसलिए कुल कमी \(13\times5=65\) है।

Open Question Page
Ask Friends

Mathematics Quiz Navigation

Mathematics Subject

All difficulty level maps

Mathematics Practice

Subject practice

Easy Level 1

Foundation practice

Search Mathematics

Find related MCQs

All Subjects

Choose another subject
FAQs

Class 9 Mathematics Quiz FAQs

How many questions are in this quiz?

This level is designed for 50 active questions. Currently 50 questions are available for the selected class and difficulty.

Is there a timer in this quiz?

Yes, the timer uses 35 seconds per question for Medium difficulty and shows the total remaining time on the page.

Can I open each question separately?

Yes, every question has its own SEO-friendly page with answer, explanation and related practice links.