Question

When I was 4 years old my brother was half my age. I am now 18 years old, how old is my brother?

Answer 1

my age=4 years
my brother's age=half of 4=2
difference in our ages=4-2=2
my present age=18 years
my brother's present age=18-2=16 years

Answer 2

the brother is 16yrs old now.