The present age of a father is 3 years more than three times the age of his son. Three years hence, father’s age will be 10 years more than twice the age of the son. Find the present age of the father ?

\par Let the son's present age be x years.

\par Then father's present age = (3x + 3) years.

(3x + 3 + 3) = 2(x + 3) + 10

3x + 6 = 2x + 16

x = 10

\par Hence father's present age = (3x + 3) = (3\times 10 + 3) = 33 years