Practice focused topic-wise MCQs with answers and explanations for quick revision and exam preparation.
Difficulty select karke sirf is topic ke focused MCQs practice karein. Score, timer aur explanations student-friendly flow me milenge.
Showing 301-310 of 604 questions.
If (n=-4), what is the value of \(\frac{n^2+n}{2}\)?
B. (6)
(\frac{(-4)2+(-4)}{2}=\frac{16-4}{2}=6)। भिन्न में पहले अंश को सरल करें। / (\frac{(-4)2+(-4)}{2}=\frac{16-4}{2}=6). Simplify the numerator first in a fraction.
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What is obtained after simplifying (3(a-b)+2(2a+b))?
B. (7a+b)
खोलने पर (3a-3b+4a+2b) मिलता है। समान पद मिलाकर (7a-b) नहीं बल्कि (7a-b) मिलता है। / Expanding gives (3a-3b+4a+2b). Combining like terms gives (7a-b), not (7a+b).
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What is obtained after simplifying \(4x^2-6xy+3x^2+xy\)?
B. \(7x^2-5xy\)
\(4x^2+3x^2=7x^2\) और (-6xy+xy=-5xy)। समान चर भाग वाले पदों को मिलाएँ। / \(4x^2+3x^2=7x^2\) and (-6xy+xy=-5xy). Combine terms with the same variable part.
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Which option correctly gives the constant term of \(2x^2+5x-1\)?
C. (-1)
स्थिर पद में कोई चर नहीं होता और उसे चिन्ह सहित लिखा जाता है। यहाँ स्थिर पद (-1) है। / A constant term has no variable and is written with its sign. Here the constant term is (-1).
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What is the simplified form of (3(2x-5)-2(x+4))?
A. (4x-23)
कोष्ठक खोलने पर (6x-15-2x-8=4x-23) मिलता है। ऋण चिह्न को पूरे कोष्ठक पर लगाएं। / Expanding gives (6x-15-2x-8=4x-23). Apply the negative sign to the whole bracket.
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If (a=-2), what is the value of \(4a^2-3a-5\)?
B. (17)
(a=-2) रखने पर (4(4)+6-5=17) मिलता है। ऋणात्मक मान का वर्ग धनात्मक होता है। / Putting (a=-2) gives (4(4)+6-5=17). The square of a negative value is positive.
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What is the simplified form of \(5p^2-3p+7-2p^2+8p-4\)?
C. \(3p^2+5p+3\)
समान पद जोड़ने पर \(5p^2-2p^2=3p^2\), (-3p+8p=5p) और (7-4=3) मिलता है। पदों को घात के अनुसार समूहित करें। / Combining like terms gives \(5p^2-2p^2=3p^2\), (-3p+8p=5p) and (7-4=3). Group terms by powers.
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Which option gives the correct form of the difference (2x+3-(5x-9))?
C. (-3x+12)
घटाए गए व्यंजक के चिह्न बदलने पर (2x+3-5x+9=-3x+12) मिलता है। कोष्ठक हटाते समय चिह्न ध्यान से बदलें। / Changing signs of the subtracted expression gives (2x+3-5x+9=-3x+12). Change signs carefully while removing brackets.
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If (x=3) and (y=-1), what is the value of \(2x^2-xy+4y\)?
A. (17)
मान रखने पर (2(9)-3(-1)+4(-1)=17) मिलता है। दो चर वाले प्रश्न में चिह्न अलग से जांचें। / Substitution gives (2(9)-3(-1)+4(-1)=17). In two-variable questions, check signs separately.
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Which expression represents the sum of three consecutive even numbers starting from (n)?
B. (3n+6)
तीन लगातार सम संख्याएं (n), (n+2), और (n+4) होंगी। उनका योग (3n+6) है। / The three consecutive even numbers are (n), (n+2), and (n+4). Their sum is (3n+6).
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