Multiple choice general knowledge math & puzzles

8, 27, 64, 100, 125, 216, 343

  1. 27

  2. 100

  3. 125

  4. 343
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the list 8, 27, 64, 100, 125, 216, 343, all numbers are perfect cubes (2³, 3³, 4³, 5³, 6³, 7³) except 100, which is 10² (a perfect square, not a cube). 100 = 10 × 10, not a cube of any integer.

AI explanation

The correct answer is 100. Every other number in the list is a perfect cube: 8=2³, 27=3³, 64=4³, 125=5³, 216=6³, 343=7³. Only 100 breaks the pattern — it is a perfect square (10²) but not a perfect cube, making it the odd one out. This is a classic 'find the number that doesn't fit the rule' series question, and recognizing the cube sequence 2³ through 7³ (skipping the intruder) is the key insight.

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