Unit 1 Math Test

Factors

100

List all the factors of 9.

1, 3, 9

200

List all the factors of 16.

1, 2, 4, 8, 16

300

Theses are all factors of what number? 1, 2, 3, 4, 6, 8, 12, 16, 24, 48 

48

400

List all the factors of 64.

1, 2, 4, 8, 16, 32, 64

500

List all the factors of 100.

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

Prime/Composite

100

Is 11 prime or composite? Show or explain.

Prime. 1 x 11= 11; It only has 2 factors, 1 and itself.

200

Is 2 prime or composite? Show or explain.

Prime. 1 x 2= 2; It only has 2 factors, 1 and itself.

300

Is 24 prime or composite? Show or explain.

Composite; 1 x 24= 24, 2 x 12= 24, 3 x 8= 24, 4 x 6= 24; It has more than 2 factors.

400

Is 31 prime or composite? Show or explain.

Prime. 1 x 31= 31; It only has 2 factors, 1 and itself.

500

Is 35 prime or composite? Show or explain.

Composite; 1 x 35= 35, 5 x 7=35; It has more than two factors.

Factor Pairs

100

List all the factor pairs of 28.

1 and 28; 2 and 14; 4 and 7

200

List all the factor pairs of 19.

1 and 19

300

List all the factor pairs of 15.

1 and 15; 3 and 5

400

List all the factor pairs of 48.

1 and 48; 2 and 24; 3 and 16; 4 and 12;    6 and 8

500

List all the factor pairs of 90.

1 and 90; 2 and 45; 3 and 30; 5 and 18; 6 and 15; 9 and 10

Multiples

100

List the first 10 multiples of 5.

5 10 15 20 25 30 35 40 45 50 

200

Is 72 a multiple of 6? Why or why not?

Yes; 6 x 12= 72 

300

List the first 10 multiples of 8.

8, 16, 24, 32, 40, 48, 56, 64, 72, 80

400

Is 47 a multiple of 9? Why or why not?

No. 9 x nothing is 49; If I skip count by 9's I cannot get to 49.

500

List the first 5 multiples of 24.

24, 48, 72, 96, 120

Bonus

100

What is 5 x 9?

45

200

What is 12 x 8?

96

300

What is 20 x 7?

140

400

What is 50 x 9?

450

500

Select all the numbers that are. multiples of both 2 and 5.

a. 10

b. 20

c. 17

d. 30

e. 21

f. 40

a. b. d. f.