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Verbal Reasoning :: Series Completion - Discussion

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Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
4 2 2 3 6 15 ?

A45

B18

C20

D25

Answer: Option (Login/Signup)

Show Explanation

by dividing  second digit to first digit we get this : 1/2, 1, 3/2, 2, 5/2, so there one gap is 1/2,3/2,5/2 and other is 1,2 so the next gap will be 3.

4 * 1/2 = 2

2 * 1 = 2

2 * 3/2 =3

3 * 2 = 6

6* 5/2=15

15 * 3 = 45

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