Question

When I was 4 years old, my brother was half my age. Now, I'm 18. How old is my brother ? The setup of the question suggest his brother was half his age when he was for..but his age is then mentiond and he is 18 now witch Means that The brother must have been 9 at The time and The eqation is 3*9÷4=23 his brother is an older brother!

Answer 1

When I was 4 years old, my brother was 2 years old. (It is given that my brother is half my age at that time.)

Now, I am 18 years old. That means there is a gap of 14 years between now and then.

That in turn means my brother is also 14 years older than when he was 2 years old.

This implies that he is 14+2 = 16 years old.

Answer 2

Solution :-

When you were 4 years old, your brother was half your age.

It means your brother was 2 years old.

There is a difference of 2 years (4 - 2 = 2) between you and your brother's age.

Your present age = 18 years

Then, Your brother's present age will be = 18 - 2 = 16 years

Answer.