Question

a is 2yrs older than b who is twice as old as c. If the total of the ages of a.,b and c be 27,then how old is b? ​

Answer 1

If A is 2 years older than B, you can say that B = A - 2. If B is twice as old as C, you can say that B = 2C or C = 0.5B or C = 0.5 A - 1. Therefore you have that A + (A - 2) + (0.5A - 1) = 27, which gives 12 for A, thus 10 for B and 5 for C.