A = x

Then, B = 2x

and, F = 4x

C = x/2

and D = x/4

Thus, The second oldest is B

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# B is twice as old as A but twice younger than F. C is half the age of A but is twice older than D. Who is the second oldest ?

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A = x

Then, B = 2x

and, F = 4x

C = x/2

and D = x/4

Thus, The second oldest is B