Multiple choice

Directions: In the following number series, one number is wrong. Find out the wrong number. 50, 55, 60.5, 66.55, 70.25

  1. 50

  2. 55

  3. 60.5

  4. 70.25

  5. 66.55
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The pattern is multiplying by 1.1: 50 * 1.1 = 55. 55 * 1.1 = 60.5. 60.5 * 1.1 = 66.55. 66.55 * 1.1 = 73.205. The term 70.25 is incorrect.

AI explanation

The series follows a pattern of multiplying by 1.1 at each step, which is a method of successive percentage increment. The second term is 50 multiplied by 1.1, equaling 55, and the third term is 55 multiplied by 1.1, equaling 60.5. Continuing this pattern, 60.5 multiplied by 1.1 gives 66.55, and 66.55 multiplied by 1.1 equals 73.205. Since the given series lists 70.25 instead of 73.205, the wrong number is 70.25.

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