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  • math & puzzles Online Quiz - 9
  • Find the missing number: 1, 5, 14, 30, ?, 91
Multiple choice general knowledge math & puzzles

Find the missing number: 1, 5, 14, 30, ?, 91

  1. 45

  2. 55

  3. 60

  4. 70

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

Find the pattern in differences: 5-1=4, 14-5=9, 30-14=16. These are 2², 3², 4². Next difference should be 5²=25, giving 30+25=55. Verify: 91-55=36=6², continuing the pattern.

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