Instructions

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

Question 29

144, 215, 540, 1890, 8505, 46777.5, 304053.75

Solution

The pattern is :

144 $$\times 1.5$$ = 216 $$\neq 215$$

216 $$\times 2.5$$ = 540

540 $$\times 3.5$$ = 1890

1890 $$\times 4.5$$ = 8505

8505 $$\times 5.5$$ = 46777.5

46777.5 $$\times 6.5$$ = 304053.75

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