Exams › SSC CGL (Prelims) › General

What should come at the place of question mark? 144, 121, 100, 81, ?, 49

1. 70
2. 64
3. 66
4. 68

Correct answer: 64

Solution

The numbers are perfect squares in descending order: $12^2, 11^2, 10^2, 9^2, 8^2, 7^2$. Therefore, the missing term is $8^2 = 64$.

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