Multiple choice general knowledge math & puzzles

2, 5, 10, 17, 26, 37, 50, 64

  1. 50

  2. 26

  3. 37

  4. 64
Reveal answer Fill a bubble to check yourself
D 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, 7²+1=50. The number 64 breaks this pattern (it would be 8²+1=65). 64 is simply 8², making it the odd one out as it's a pure square while others are one more than squares.

AI explanation

The series follows n²+1: 1²+1=2, 2²+1=5, 3²+1=10, 4²+1=17, 5²+1=26, 6²+1=37, 7²+1=50, but 8²+1=65, not 64. So 64 breaks the n²+1 pattern that the rest of the sequence follows.

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