Practice Library
All MCQs
Browse exam-wise, subject-wise, and country-wise MCQs with explanations.
Correct Answer: 2
Explanation:
Rewrite the value using base 2: 4 = 2^2. Matching exponents gives x = 2.
Correct Answer: 10
Explanation:
The dot product is 1×4+2×3=10.
Correct Answer: 4
Explanation:
An antiderivative is 1/2 x²+1x. At x=2, the value is 4.0.
Correct Answer: 19
Explanation:
f′(x)=3x²+16x. Substituting x=1 gives 19.
Correct Answer: 5
Explanation:
The coordinate differences are 3 and 4, so the distance is √(3²+4²)=5.
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Correct Answer: C. 2/7
Explanation:
There are 2 favourable outcomes out of 7 equally likely outcomes, so P(red)=2/7.
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Correct Answer: B. 55/10
Explanation:
The sum is n(n+1)/2=55, so the mean is 55/10.
Correct Answer: 40
Explanation:
aₙ=a₁+(n−1)d=4+(13−1)×3=40.
Correct Answer: 13
Explanation:
By Vieta’s formula, the sum of the roots equals the coefficient 13.
Correct Answer: 10
Explanation:
Subtract 5 from both sides and divide by 8: x = (85-5)/8 = 10.
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Correct Answer: D. evidence-based and cautious
Explanation:
The passage recognises possible gains while retaining uncertainty, limits and the need for further evidence.
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Correct Answer: B. Implementation conditions can influence whether an intervention works
Explanation:
The text identifies group, maintenance, design or contextual factors, so a careful inference is that implementation conditions matter.
