Question

In the following number series, only one number is wrong. Find out the wrong number.

1, 1.5, 3, 7.5, 22.5, 75, 315

A 3 Correct Answer Incorrect Answer
B 1.5 Correct Answer Incorrect Answer
C 75 Correct Answer Incorrect Answer
D 22.5 Correct Answer Incorrect Answer
E 315 Correct Answer Incorrect Answer

Solution

The pattern of the series is: 1 × 1.5 = 1.5 1.5 × 2 = 3 3 × 2.5 = 7.5 7.5 × 3 = 22.5 22.5 × 3.5 = 78.75 78.75 × 4 = 315

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