My brother is 3 years elder to me. My father was 28 years of age when my sister was born while my mother was 26 years of age when I was born. If my sister was 4 years of age when my brother was born, then what was the age my father when my brother was born?
35 years
34 years
33 years
32 years
Explanation:
Let my age = $x$
Then
My brothers age = $x$ + 3
My mothers age = $x$ + 26
My sisters age = $\left(x + 3\right)$ + 4 = $x$ + 7
My fathers age = $\left(x + 7\right)$ + 28 = $x$ + 35
=> age my father when my brother was born = $x$ + 35 - $\left(x + 3\right)$ = 32