What is the least common multiple of 15, 22 and 24?  Pick one:
A) 60
B) 120
C) 240
D) 1320
E) 1720
Let us first write the numbers in the form of prime factors:   15 = 3*5   22 = 2*11   24 = 2 * 17^1   The LCM would be the largest powers of the prime numbers from all these three numbers.   Hence LCM = 1320   Option 1320
<result>D</result>
What is the least common multiple of 15, 22 and 24?