Multiple choice

In the following number series only one number is wrong. Find out the wrong number ? 3,7,16,32,56,93,142

  1. 56

  2. 16

  3. 32

  4. 7

  5. 93
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A Correct answer
Explanation

Analyze the pattern: 3→7 (+4), 7→16 (+9), 16→32 (+16), 32→56 (+24), 56→93 (+37), 93→142 (+49). The differences themselves have a pattern: 4, 9, 16, 24, 37, 49. The perfect squares 4, 9, 16 suggest the pattern should be 4, 9, 16, 25, 36, 49 (consecutive squares starting from 2²). If we replace 56 with 57 (making 32→57 +25), the pattern becomes: +4, +9, +16, +25, +36, +49. So 56 is the wrong number.

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