# Algorithms Quiz | SP2 Contest 1 | Question 21

Find the missing term for the below series:

5, 20, 50, 150, 240, ___

**(A)** 270**(B)** 340**(C)** 410**(D)** 480**Answer:** **(D)****Explanation:** If we classify the series in groups of two like (5, 20),(50, 150), (240, ____). We can see that the terms in groups are in the ratio (1:4), (1:3), (1:2). Therefore, the last term is 240*2 = 480.

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