Question

The sum of the age of a father and his son is 36 years. If

they both live on till the son becomes as old as the father
is now, the sum of their ages will be 84 years. Find their
present ages.
​

Answer 1

30 and 6

Explanation:

Farther = f, Son = s

• f + s = 36
• f + s + 2(f-s) = 84 ⇒ 3f - s = 84

Add up equations:

• 4f = 36 +84
• 4f = 120
• f = 120/4
• f = 30

Find s:

• s = 36 - 30 = 6