Exams › SSC CGL (Prelims) › General

An operation is defined as a $ b = a^2 - b. If a $ b = 2, which pair of values for (a, b) satisfies this?

1. 2, 2
2. 8, 1
3. 4, 5
4. 9, 6

Correct answer: 2, 2

Solution

Applying a $ b = a^2 - b to the pair (2, 2) gives 4 - 2 = 2, which matches. The other pairs do not yield 2.

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