Choose the correct alternative that will...

Choose the correct alternative that will continue the same partem and replace the question mark in the given series.
563,647,479,815,?

A

672

B

386

C

279

D

143

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The correct Answer is:

D

The pattern is `+84, +168, +336, ……….. ` i.e. `+84, -(84 xx 2), +(84 xx 2^(2))`……..
So, missing term = `815 - (84 xx 2^(3)) = 815 - 672 = 143`

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