Multiple choice

Which number in the sequence 8, 27, 64,100, 125, 216, 343 is wrongly written?

  1. 343

  2. 125

  3. 100

  4. 27
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C Correct answer
Explanation

The sequence consists of cubes: 2^3=8, 3^3=27, 4^3=64, 5^3=125, 6^3=216, 7^3=343. 100 is not a perfect cube.

AI explanation

The sequence is meant to be consecutive perfect cubes: 2 cubed is 8, 3 cubed is 27, and 4 cubed is 64. The number 100 is a perfect square, not a perfect cube like the others, so it is the wrongly written number.

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