Multiple choice

Find the wrong number in the following number series 38, 49, 62, 72, 77, 91, 101

  1. 49

  2. 72

  3. 77

  4. 91

  5. 38
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B Correct answer
Explanation

The series follows alternating prime differences: +11, +13, +11, +13 pattern. Checking: 38+11=49, 49+13=62, 62+11=73 (not 72), 73+13=86, 86+11=97, 97+13=110. Since 72 breaks the alternating prime pattern (should be 73), it's the wrong number. All other terms fit the pattern.

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