Ch. 9 Factors and Multiples

Factors

100

Name the factors of 11

1, 11

200

Name the factors of 12

1, 2, 3, 4, 6, 12

300

Name the factors of 24

1, 2, 3, 4, 6, 8, 12, 24

400

Name the factors of 100

1, 2, 4, 5, 10, 20, 25, 50, 100

500

Name the factors of 60

1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60

Factor Pairs

100

Name all the factor pairs for 13

1x13

200

Name all the factor pairs for 27

1x27, 3x9

300

Name all the factor pairs for 18

1x18, 2x9, 3x6

400

Name all the factor pairs for 36

1x36, 2x18, 3x12, 4x9, 6x6

500

Name all the factor pairs for 72

1x72, 2x36, 3x24, 4x18, 6x12, 8x9

Prime or Composite

100

Is 5 prime or composite?

prime

200

Is 39 prime or composite?

Composite

300

Is 51 prime or composite?

Composite

400

Is 61 prime or composite?

Prime

500

We are numbers between 60 and 90. We are composite. Our tens digit is twice our ones digit. What are we?

63, 84

Multiples

100

List the first 5 multiples of 2

2, 4, 6, 8, 10

200

List the first 6 multiples of 4

4, 8, 12, 16, 20, 24

300

List the first 5 multiples of 12

12, 24, 36, 48, 60

400

I am between 30 - 50. I am a multiple of 17. What am I?

34

500

We are between 50 and 70. We are multiples of 6. What are we? 

54, 60, 66

Common Multiples

100

What is the first common multiple of 2 and 4?

4

200

What is the first common multiple of 6 and 18?

18

300

What is the first common multiple of 6 and 15?

30

400

Mary runs a lap in 6 minutes. John runs a lap in 8 minutes. If they start at the same time, after how much time will they cross the finish line at the same time? 

24 minutes

500

A store has two signs. One blinks every 4 seconds. The other blinks every 5 seconds. How many times will they blink at the same time in a minute?

3 times