Number Series | Reasoning | Discussion Page

Given series formed in definite pattern and next number follows the predecessor.

Find the number in series 4,20,80,240...

A) 480

B) 820

C) 204

D) 320

Option A

Term multiply with decreasing factor.
$4\times5=20$
$20\times4=80$
$80\times3=240$

So, next product difference is 2 so $240\times2 = 480$

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