4 years back, the combined age of 'Arvind' and 'Chirag'

Solution

ATQ, Seven years hence from now, the sum of ages of 'Bishma' and 'Chirag' will be 63 years. So, sum of present age of 'Bishma' and 'Chirag' = 63 - (2 × 7) = 49 years Let present age of 'Chirag' be 'p' years. So, present age of 'Bishma' = (49 - p) years Let the sum of present ages of 'Arvind' and 'Bishma' be 'q' years. So, the present age of 'Arvind' = q - (49 - p) = (q + p - 49) years Four years ago from now, sum of ages of 'Arvind' and 'Chirag' was 9 years less than the sum of present ages of 'Arvind' and 'Bishma'. So, ATQ; (q + p - 49 - 4) + (p - 4) + 9 = q Or, q + 2p - 48 = q Or, 2p = 48 So, p = (48/2) = 24 So the present age of 'Chirag' = p = 24 years