Multiple choice

Directions: A number series is given below, in which only one number is wrong. Find out the wrong number. 6, 7, 9, 13, 26, 37, 69

  1. 7

  2. 26

  3. 69

  4. 37

  5. 9
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B Correct answer
Explanation

The series is 6, 7, 9, 13, 21, 37, 69. The differences are 1, 2, 4, 8, 16, 32. The term 26 is incorrect.

AI explanation

The pattern in the series follows the method of adding successive powers of 2. The terms are calculated as 6 plus 1 equals 7, 7 plus 2 equals 9, 9 plus 4 equals 13, and 13 plus 8 should equal 21, not 26. Continuing this pattern, 21 plus 16 equals 37, and 37 plus 32 equals 69. The wrong number in the series is 26.

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