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 311-320 of 604 questions.
What is the simplified form of (7m-2(3m-4)+5(m-1))?
A. (6m+3)
खोलने पर (7m-6m+8+5m-5=6m+3) मिलता है। पहले सभी कोष्ठक खोलें फिर समान पद जोड़ें। / Expanding gives (7m-6m+8+5m-5=6m+3). Open all brackets first and then combine like terms.
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If (r=4), what is the value of \(\frac{3r^2-2r}{2}\)?
C. (20)
(r=4) रखने पर (\frac{3(16)-8}{2}=\frac{40}{2}=20) मिलता है। भिन्न में पूरा अंश पहले सरल करें। / Putting (r=4) gives (\frac{3(16)-8}{2}=\frac{40}{2}=20). Simplify the whole numerator first in a fraction.
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Which option gives the correct simplified form of \(4a^2b-7ab^2+3a^2b+2ab^2\)?
A. \(7a^2b-5ab^2\)
\(4a^2b+3a^2b=7a^2b\) और \(-7ab^2+2ab^2=-5ab^2\)। अलग चर भागों को अलग रखें। / \(4a^2b+3a^2b=7a^2b\) and \(-7ab^2+2ab^2=-5ab^2\). Keep different variable parts separate.
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In which expression is the coefficient of (x) equal to (0) but the \(x^2\) term is present?
B. \(x^2-7\)
\(x^2-7\) में प्रथम घात वाला (x) पद नहीं है। इसलिए (x) का गुणांक (0) माना जाता है। / In \(x^2-7\), there is no first-power (x) term. So the coefficient of (x) is taken as (0).
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What is the simplified form of (2(x-y)-3(y-x))?
A. (5x-5y)
खोलने पर (2x-2y-3y+3x=5x-5y) मिलता है। (y-x) पर ऋण गुणन करते समय सावधान रहें। / Expanding gives (2x-2y-3y+3x=5x-5y). Be careful while multiplying (y-x) by a negative number.
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If (u=-3) and (v=2), what is the value of \(u^2-2uv+v^2\)?
C. (25)
मान रखने पर (9-2(-6)+4=25) मिलता है। (uv) का चिह्न पहले निकालें। / Substitution gives (9-2(-6)+4=25). Find the sign of (uv) first.
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The length of a rectangle is (2x+3) and its breadth is (x-5). What is its perimeter?
B. (6x-4)
परिमाप (2[(2x+3)+(x-5)]=2(3x-2)=6x-4) है। पहले लंबाई और चौड़ाई जोड़ें। / The perimeter is (2[(2x+3)+(x-5)]=2(3x-2)=6x-4). Add length and breadth first.
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Which option gives the correct sum of \(-5x^2\) and \(8x^2\)?
D. \(3x^2\)
गुणांक (-5+8=3) हैं और चर भाग \(x^2\) वही रहता है। इसलिए योग \(3x^2\) है। / The coefficients are (-5+8=3) and the variable part \(x^2\) remains the same. So the sum is \(3x^2\).
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What is the simplified form of (4(2a-3b)-3(a-2b))?
A. (5a-6b)
खोलने पर (8a-12b-3a+6b=5a-6b) मिलता है। समान चर वाले पदों को ही जोड़ें। / Expanding gives (8a-12b-3a+6b=5a-6b). Combine only terms with the same variable.
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If (x=1), what is the value of \(5x^3-4x^2+3x-2\)?
B. (2)
(x=1) रखने पर (5-4+3-2=2) मिलता है। (1) की हर धनात्मक घात (1) होती है। / Putting (x=1) gives (5-4+3-2=2). Every positive power of (1) is (1).
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