Factors
List all the factors of 9.
1, 3, 9
Is 11 prime or composite? Show or explain.
Prime. 1 x 11= 11; It only has 2 factors, 1 and itself.
List all the factor pairs of 28.
1 and 28; 2 and 14; 4 and 7
List the first 10 multiples of 5.
5 10 15 20 25 30 35 40 45 50
What is 5 x 9?
45
List all the factors of 16.
1, 2, 4, 8, 16
Is 2 prime or composite? Show or explain.
Prime. 1 x 2= 2; It only has 2 factors, 1 and itself.
List all the factor pairs of 19.
1 and 19
Yes; 6 x 12= 72
What is 12 x 8?
96
48
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.
List all the factor pairs of 15.
1 and 15; 3 and 5
List the first 10 multiples of 8.
8, 16, 24, 32, 40, 48, 56, 64, 72, 80
140
List all the factors of 64.
1, 2, 4, 8, 16, 32, 64
Is 31 prime or composite? Show or explain.
Prime. 1 x 31= 31; It only has 2 factors, 1 and itself.
List all the factor pairs of 48.
1 and 48; 2 and 24; 3 and 16; 4 and 12; 6 and 8
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.
What is 50 x 9?
450
List all the factors of 100.
1, 2, 4, 5, 10, 20, 25, 50, 100
Is 35 prime or composite? Show or explain.
Composite; 1 x 35= 35, 5 x 7=35; It has more than two factors.
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
List the first 5 multiples of 24.
24, 48, 72, 96, 120
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.