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Multiple choice

Find the wrong number in the series from the given alternative. 1, 2, 5, 10, 17, 28, 37

  1. 10

  2. 28

  3. 17

  4. 5

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The pattern is n² + 1: 1²+1=2, 2²+1=5, 3²+1=10, 4²+1=17, 5²+1=26, 6²+1=37. The number 28 breaks this pattern (it should be 26). All other numbers follow n² + 1 correctly.

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