Three numbers are in the ratio 3:4:5 and their L.C.M is 2400. Their H.C.F is:	Choose the correct choice:
A) 40  B) 80  C) 120  D) 200  E) 220
Let the numbers be 3x, 4x and 5x.   Then, their L.C.M = 60x. So, 60x = 2400 or x = 40.   The numbers are (3 * 40), (4 * 40) and (5 * 40).   Hence, required H.C.F = 40.   40NSWER:40
<result>A</result>
Three numbers are in the ratio 3:4:5 and their L.C.M is 2400. Their H.C.F is: