Question: what is a common multiple of 2 3 and 5?
Answer: Since 5 has no factors besides 1 and 5 . The LCM of 2,3,5 2 , 3 , 5 is the result of multiplying all prime factors the greatest number of times they occur in either number. The LCM of 2,3,5 2 , 3 , 5 is 2⋅3⋅5=30 2 ⋅ 3 ⋅ 5 = 30 .