Multiple choice general knowledge math & puzzles

1,5,14,30,55.. which is the next number in the series?

  1. 85

  2. 81

  3. 91

  4. 67
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C Correct answer
Explanation

The series represents the sum of squares of consecutive integers: 1, 1+4=5, 5+9=14, 14+16=30, 30+25=55. The next increment is 6^2 (36). 55 + 36 = 91. This is a standard mathematical sequence known as square pyramidal numbers.

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