Exams › SSC CGL (Prelims) › General

Define the operation a % b = a^2 - b^2. If a % b equals 63, which pair of values for a and b satisfies this?

1. 9 and 6
2. 10 and 7
3. 8 and 1
4. 7 and 4

Correct answer: 8 and 1

Solution

Testing 8 and 1 gives 8^2 - 1^2 = 64 - 1 = 63, which matches exactly. No other listed pair yields 63.

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