Aptitude - Problems on Ages - Discussion

X is the son's age after 2 years and twice rite that's why 2 (x+2).

In this question the basic technique is to emphasise on son rather than on father as the whole question (see it carefully) revolves around the.

Age of the son.

So lets sons age be 'x'.

Now according to the condition.

Father's age will be 24+x.

And after 2 years hence (means after 2 years).

Father's age will become (24+x+2).

And sons age will become (x + 2).

Now fathers age is twice more than sons age.

To make lhs = rhs.

We will multiply 2 not with the current age of father but with the current age of son (important point).

So 2(x + 2) = 24 + x + 2.

So value of x = 22.

So sons age is '22'.

Friends how we take 4 at there?

Son age x,

Father age x+24,

After two year mean you will add 2 in both side.

(x+24+2) = (x+2).

Father age is twice as son age i.e (x+24+2) = 2(x+2).

x+26 = 2x+4.

::22 = x.

@Maha.

Let the present age of son is x.

And as given in question the present age of father (f=24+x) and after 2 year later.

Father age = 2x.

In calculating the present age of son as given below as after 2 year.

24+x+2 = 2(x+2).
26+x = 2x+4.

So x = 22.

So because of x = present age of son, we have to add 2 year in present age of son and in this way we can calculate the value of x.

I hope you understand.

Why can't we do like this:

(2+2x) =24.
2x = 24-2.
2x = 22.
x = 11.

So then twice will be 22.

Why we adding x+2 in left side?

Answer is 20 because after getting value of x which is age after 2 years is 22. So from 22-2=20 is age and his father is 24.

It can be also solved by this? please reply me !

Let the son age be x.
After 2 years he will be twice of his son age..
Then..
2x+2=24.

x=11 then x= 11 the son's age and his father age 2x=2*11 = 22.

From my point of view answer is 20 years old because 22 years is calculated 2 years later. So the present year is 20 what you say guys. Correct me if I am wrong.

Thank you.