Instructions

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

Question 26

4, 3, 4.5, 8.5, 20, 53, 162.5

Solution

The pattern is :

4 $$\times 0.5 + 1$$ = 3

3 $$\times 1 + 1.5$$ = 4.5

4.5 $$\times 1.5 + 2$$ = 8.75 $$\neq 8.5$$

8.75 $$\times 2 + 2.5$$ = 20

20 $$\times 2.5 + 3$$ = 53

53 $$\times 3 + 3.5$$ = 162.5

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