18, 45, 90, 220, 450

18, 45, 90, 220, 450

Direction: Find out the wrong number in the following number series.

18, 45, 90, 220, 450

A.450

B.18

C.220

D.45

E. None of these

Sol:

18 * 2.5 = 45

45 * 2 = 90

90 * 2.5 = 225 225 * 2 = 450

quantitative aptitude
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