carcass wrote:

Today Jim is twice as old as Fred, and Sam is 2 years younger than Fred. Four years ago Jim was 4 times as old as Sam. How old is Jim now?

A. 8

B. 12

C. 16

D. 20

E. 24

Use of graphical presentation helps a lot in such age related questions. Let's see how it works.

----------

4 yeas ago----------------------------

today------------

-------

J-------F--------S---------------------

.J---------F---------S----------------------------------------------(2x)--------(x)---------(x-2)

[let's consider today age of Fred is x, the ages of Jim is 2x, and age of Sam is (x-2)]------(2x-4)-----(x-4)-------(x-2-4)---------------------------------------

[this are the ages of J, F and S 4 years ago]As, per condition given in the question,

->2x-4= 4(x-6)

-> 2x-4=4x-24

-> 20=2x

-> x=10

Therefore, 2x=20, this is the age of Jim today.

So, the answer is D

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