Common multiples and the lowest common multiple

Question 1

What is the lowest common multiple of 3 and 5?

Answer 

Question 2

Two buses leave the station together at 8:00. One leaves every 10 minutes and the other every 15 minutes. After how many minutes do they next leave together?

Answer 

Question 3

What is the lowest common multiple of 3 and 5?

Answer 

Question 4

Two buses leave the station together at 9:00. One leaves every 9 minutes and the other every 12 minutes. After how many minutes do they next leave together?

Answer 

Question 5

What is the lowest common multiple of 2 and 3?

Answer 

Question 6

Two buses leave the station together at 9:00. One leaves every 12 minutes and the other every 20 minutes. After how many minutes do they next leave together?

Answer 

Question 7

What is the lowest common multiple of 3 and 4?

Answer 

Question 8

Two buses leave the station together at 7:00. One leaves every 10 minutes and the other every 15 minutes. After how many minutes do they next leave together?

Answer 

Question 9

What is the lowest common multiple of 4 and 6?

Answer 

Question 10

Two buses leave the station together at 8:00. One leaves every 6 minutes and the other every 8 minutes. After how many minutes do they next leave together?

Answer 

Question 11

What is the lowest common multiple of 6 and 9?

Answer 

Question 12

Two buses leave the station together at 9:00. One leaves every 8 minutes and the other every 12 minutes. After how many minutes do they next leave together?

Answer 

Question 13

What is the lowest common multiple of 8 and 12?

Answer 

Question 14

Two buses leave the station together at 9:00. One leaves every 12 minutes and the other every 20 minutes. After how many minutes do they next leave together?

Answer 

Question 15

What is the lowest common multiple of 4 and 6?

Answer 

Question 16

Two buses leave the station together at 10:00. One leaves every 12 minutes and the other every 20 minutes. After how many minutes do they next leave together?

Answer