The sum of two numbers is 528 and their HCF is 33. The number of pairs of such numbers satisfying the given condition is
Let numbers are 33a, 33b
33a+33b=528
A+b=16
(a,b)= (1,15),(2,14),(3,13),(4,12),(5,11),(6,10),(7,9),(8,8)
Out of these pairs only 4 pairs are co prime.