The pattern of the first line series is obtained as times 2, times 4, times 2, times 4, times 2 Therefore, the second line series can be completed on the basis of the same pattern as 4, a 4 times 2, b 8 times 4, c 32 times 2, d 64 times 4 Hence, the value of d is 256

Question

5 10 40 80 320 640 4 a b c d e Find the value of
d.

In each of the following questions, a number series is given. After the series a number is given followed by (a), (b), (c), (d) and (e). You have to complete the series starting with the number given following the sequence of the given series.

A 172

B 180

C 256

D 182

E None of these

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