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 561-570 of 604 questions.
If (m=-1) and (n=4), what is the value of \(3m^2n-2mn^2\)?
C. (44)
(3m-2n=3(1)(4)=12) और (-2mn-2=-2(-1)(16)=32) है। कुल मान (44) है। / (3m-2n=3(1)(4)=12) and (-2mn-2=-2(-1)(16)=32). The total value is (44).
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Which expression represents adding (4xy) to the square of the difference of (x) and (y)?
D. ((x-y)2+4xy)
पहले अंतर (x-y) का वर्ग लिया जाता है फिर (4xy) जोड़ा जाता है। इसलिए ((x-y)2+4xy) सही है। / First the difference (x-y) is squared and then (4xy) is added. Therefore ((x-y)2+4xy) is correct.
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After simplifying \(7x^2y+3xy^2-9x^2y+5xy^2\), what will be the coefficient of \(x^2y\)?
A. (-2)
\(x^2y\) वाले पद \(7x^2y\) और \(-9x^2y\) हैं। उनका योग \(-2x^2y\) है। / The \(x^2y\) terms are \(7x^2y\) and \(-9x^2y\). Their sum is \(-2x^2y\).
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What is obtained after simplifying (6x-(3x-(5x-8)))?
D. (4x-8)
अंदर (3x-(5x-8)=-2x+8) है। इसलिए (6x-(-2x+8)=8x-8) नहीं बल्कि (8x-8) मिलता है। / Inside, (3x-(5x-8)=-2x+8). Hence (6x-(-2x+8)=8x-8), so check signs carefully.
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If the value of \(kx^2-4x-6\) at (x=3) is (9), what is (k)?
B. (3)
मान रखने पर (9k-12-6=9) मिलता है। इसलिए (9k=27) और (k=3)। / Substitution gives (9k-12-6=9). Therefore (9k=27) and (k=3).
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Which option gives the correct group of like terms of \(p^2q^3\)?
A. \(4p^2q^3\), \(-6p^2q^3\), \(p^2q^3\)
समान पदों में चर और उनकी घातें बिल्कुल समान होती हैं। पहले विकल्प में हर पद का चर भाग \(p^2q^3\) है। / Like terms have exactly the same variables and powers. In the first option, every term has variable part \(p^2q^3\).
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What is obtained after simplifying (3a-2-2ab+5b-2-\(2a^2+ab-4b^2\))?
C. \(a^2-3ab+9b^2\)
घटाने वाले कोष्ठक के चिन्ह बदलते हैं। सरल रूप \(3a^2-2ab+5b^2-2a^2-ab+4b^2=a^2-3ab+9b^2\) है। / Signs change in the subtracted bracket. The simplified form is \(3a^2-2ab+5b^2-2a^2-ab+4b^2=a^2-3ab+9b^2\).
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If (a+b=8) and (ab=12), what is the value of (4(a+b)-ab)?
D. (20)
दिए हुए पूरे व्यंजकों को सीधे रखें। (4(8)-12=20) मिलता है। / Substitute the given whole expressions directly. (4(8)-12=20).
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What is obtained after simplifying (4r(r-1)-3r(2-r))?
A. \(7r^2-10r\)
(4r(r-1)=4r-2-4r) और (-3r(2-r)=-6r+3r-2) है। कुल \(7r^2-10r\) है। / (4r(r-1)=4r-2-4r) and (-3r(2-r)=-6r+3r-2). The total is \(7r^2-10r\).
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How many terms remain after simplifying \(8p^2q-3pq+6pq-5p^2q+4\)?
B. (3)
सरल रूप \(3p^2q+3pq+4\) है। इसमें तीन अलग पद रहेंगे। / The simplified form is \(3p^2q+3pq+4\). It has three distinct terms.
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