Question

What’s the least common multiple (LCM) for each group of numbers? a. 6 and 15 b. 4 and 11 c. 6, 9, and 12 d. 8, 10, and 20

Answer 1

6 and 15 is 30; 4 and 11 is 44; 6, 9, 12 is 36; 8, 10, 20 is 40. Find the lowest number they all divide into evenly.

Answer 2

LCM is 30

LCM is 44

LCM is 36

LCM is 40

Explanation:

find the least common multiple (LCM) for each group of numbers

a. 6 and 15

Lets write the multiples of each number

6 ----> 6, 12, 18, 24, 30, 36......

15----->15, 30 , 45,.......

LCM is 30

b. 4 and 111

Lets write the multiples of each number

4 ----> 4,8,12,16,20,24,28,32,26,40, 44,.......

11----->11,2,,33,44,55,...............

LCM is 44

c. 6,9 and 12

Lets write the multiples of each number

6 ----> 6, 12, 18, 24, 30, 36......

9----->9,18,27,36,45,54,63,72........

12 -----> 12, 24, 36, 48, 60,.......

LCM is 36

d. 8, 10, and 20

Lets write the multiples of each number

8------> 8,16,24,32, 40, 48.......

10------>10,20,30,40,......

20----->20,40,60,......

LCM is 40