Common Multiples Year 6

Multiples Master

100

What are the first five positive multiples of 3?

3, 6, 9, 12, 15

200

Is 42 a multiple of 6?

Yes, because 6 × 7 = 42.

300

Find the missing number: 7, 14, 21, __, 35, 42.

28

400

What is the smallest number greater than 50 that is a multiple of both 4 and 6?

60

500

Find all the numbers between 40 and 100 that are multiples of both 6 and 9.

54, 72, 90

Common Multiples

100

What is the first positive common multiple of 2 and 5?

10

200

Give the first three positive common multiples of 3 and 4.

12, 24, 36

300

Is 36 a common multiple of 4 and 9? Explain.

Yes. 4 × 9 = 36 and 9 × 4 = 36.

400

Find the first three positive common multiples of 6 and 8.

24, 48, 72

500

Find the smallest positive number that is a common multiple of 4, 6 and 9.

36

LCM

100

What is the lowest common multiple of 2 and 4?

4

200

What is the LCM of 5 and 6?

30

300

Find the LCM of 8 and 12.

24

400

Find the LCM of 9 and 15.

45

500

Find the LCM of 12, 15 and 20.

60

Mystery Numbers

100

I am a multiple of both 2 and 3. I am greater than 5 but less than 10. What am I?

6

200

I am a common multiple of 4 and 5. I am between 30 and 50. What am I?

40

300

I am the smallest positive common multiple of 6 and 7. What am I?

42

400

I am a common multiple of 8 and 9. I am between 100 and 200. What am I?

144

500

I am the smallest three-digit number that is a common multiple of 6, 8 and 10. What am I?

120

Reasoning & Problem Solving

100

True or false: Every multiple of 10 is also a multiple of 5.

True. Every multiple of 10 is divisible by 5.

200

Two bells ring together. One rings every 3 minutes and the other every 4 minutes. How many minutes until they ring together again?

12 minutes

300

Two buses leave a station together. One leaves every 8 minutes and the other every 12 minutes. How many times will they leave together again in the next hour?

2 times - after 24 and 48 minutes. 

400

A learner says, "The LCM of two numbers is always the two numbers multiplied together."

Is this correct? Give an example to explain

No. For 4 and 6, the LCM is 12, not 24.

500

Three lights flash every 6, 8 and 15 seconds. They flash together at 12:00:00. At what time will they all flash together again?

12:02:00, because the LCM is 120 seconds.