Question

Sum of two different numbers is 135 and their G.C.D is 15.Then how many such pairs are possible?

Answer 1

suppose X+Y=135 IF X=15  THEN Y= 135-15=120

IF X=30 THEN Y= 135-30=105

IF=45 THEN Y= 135-45=90

IF IF=60 THEN Y= 135-60=75