Multiple choice

DIRECTIONS: Find out the wrong number in the series. 27, 125, 343, 81, 1331

  1. 125

  2. 27

  3. 1331

  4. 81
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D Correct answer
AI explanation

The series consists of cubes of odd prime numbers: 3 cubed is 27, 5 cubed is 125, 7 cubed is 343, and 11 cubed is 1331. The number 81 is 3 to the 4th power, which does not fit the pattern of cubes. Therefore, the wrong number in the series is 81.

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