Problems on Ages - General Questions

The sum of the ages of two brothers is 54 years and the elder is 6 years older than the younger. What is the age of the elder brother?

2 years ago, A was 4 times as old as B. A is now 42 years older than B. What is B's present age?

The ratio of the present ages of A and B is 3 : 4. After 7 years the ratio will be 31 : 39. What is A's present age?

A father is 5 times as old as his son. After 3 years he will be 4 times as old as his son. What is the father's present age?

The sum of the ages of two brothers is 24 years and the elder is 14 years older than the younger. What is the age of the elder brother?