Problems on Ages - General Questions

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

A father is 5 times as old as his son. After 4 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 68 years and the elder is 14 years older than the younger. What is the age of the elder brother?

5 years ago, A was 3 times as old as B. A is now 12 years older than B. What is B's present age?

A father is 5 times as old as his son. After 11 years he will be 3 times as old as his son. What is the father's present age?