Factors
Name a factor pair of 12
1 & 12, 2 & 6, 3 & 4
Name a multiple of 10
10,20,30,40,50,60 (and more)
Is 13 a prime number or a composite number? Explain or show your reasoning.
Han has 12 cards. He splits them evenly between 3 friends. How many cards does each friend get?
What are all the factor pairs of 18?
1 & 18, 2 & 9, 3 & 6?
True: 6x4=24
Is 18 a prime number or a composite number?
Could 72 cards be divided evenly among 6 players? Explain.
yes - 6x12=72
what is 5 x 12
60
Is 36 a factor of 6
No - 36 is a MULTIPLE of 6
Name three multiples of 5.
5, 10, 15, 20, 25, 30 (and more)
Is 19 a prime number or a composite number?
Prime - only factors are 1 and 19
Could 72 cards be divided evenly among 5 players? Explain.
No - 72 is not a factor of 5
A sandwich costs $5. You buy 4 sandwiches. How much do you spend?
$20
Find all factor pairs of 72.
1 & 72, 2 & 36, 3 & 24, 4 & 18, 6 & 12, 8 & 9.
Name 3 multiples of 8
8, 16, 24, 32, 40, or 48
Is 36 a prime number or a composite number? Explain or show your reasoning.
36 is a composite number. It has more than two factors (6x6 2x18, 3x12,1x36)
If there are 8 players, how many cards could there be so that everyone gets the same amount?
any multiple of 8? (8, 16, 24, 32, …, 72, etc)
What is the largest 2-digit number?
99
Name 2 factor pairs of 72
1 & 72, 2 & 36, 3 & 24, 4 & 18, 6 & 12, 8 & 9
Select all true statements.
A. 12 is a multiple of 3.
B. 5 is a factor of 20.
C. 7 is a factor of 42.
D. The only factor pair of 21 is 1 and 21.
E. The factor pairs of 18 are 1 and 18, 2 and 9, and 3 and 6.
A, B, C, E.
Is 31 a prime number or a composite number?
Prime - only factors are 1 and 31
Could 50 cards be divided between 12 players?
no - 50 is not a multiple of 12
If the area of a rectangle is 72 cm2 and one side is 12 cm. How big is the other side?
6cm - 12x6=72