If x, y, and z are positive integers, and 4x = 5y = 6z, then the least possible value of x + y + z is  Choose the correct choice from the following answers
A) 15	B) 28	C) 37	D) 42	E) 60

Rationale: take lcm of 4,5 and 6 = 60 now 4 x = 60 = > x = 15 5 y = 60 = > y = 12 6 z = 60 = > z = 10 115 + 12 + 10 = 37 . option c .
Answer: C