Paper 1 · Mathematical Reasoning and Aptitude
If the side of a square is increased by 25%, by what percentage does its area increase?
A25%
B50%
C62.5%
DNone of the above ✓ Correct
Correct answer: (D) None of the above — The correct value is not listed, so none of the above is the answer.
Explanation
★The correct value is not listed, so none of the above is the answer.
★The area of a square is the square of its side.
★If the side becomes 1.25 times, the area becomes 1.25 squared times.
★1.25 squared is 1.5625, a rise of 0.5625.
★So the area increases by 56.25 per cent, which is not among the options.
★So the answer is none of the above.
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