Question

Select the number from among the given options that can

64 - 4 60 60 - 8 52 52 - 12 40 40 - 16 24 24 - 20 4

replace the question mark (?) in the following series. 64, 60, 52, 40, ?, 4

A 20

B 24

C 10

D 16

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Solution