Multiple choice

Directions: In the number series given below, a number is wrong. Find out the wrong number. 5, 7, 9, 13, 15, 19, 23, 25

  1. 9

  2. 13

  3. 15

  4. 23

  5. 25
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C Correct answer
AI explanation

The series is based on a pattern of increasing differences that are consecutive odd numbers starting from 2. The initial differences are 5 plus 2 equals 7, 7 plus 4 equals 11, 11 plus 2 equals 13, and 13 plus 4 equals 17. To maintain this alternating addition of 2 and 4, the term after 19 should be 19 plus 4 equals 23, making the next term 23 plus 2 equals 25, which proves that 15 is the wrong number.

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