Exams › SSC CGL (Prelims) › General

If 2 @ 3 = 25 and 3 @ 4 = 49, what is 4 @ 5?

1. 81
2. 100
3. 121
4. 91

Correct answer: 81

Solution

For 2 @ 3, the sum is 5 and 5^2 = 25. For 3 @ 4, the sum is 7 and 7^2 = 49. So for 4 @ 5, the sum is 9 and 9^2 = 81.

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