Multiple choice

Find the wrong number in the following number series? 87, 88, 92, 102, 117, 142

  1. 88

  2. 102

  3. 87

  4. 92

  5. 142
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B Correct answer
Explanation

The pattern is: add consecutive squares starting from 1: 87+1²=88, 88+2²=92, 92+3²=101 (not 102), 101+4²=117, 117+5²=142. So 102 is wrong - should be 101.

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