What are the factors of 12?
1, 12
2, 6
3, 4
What are the first 5 multiples of 4?
4, 8, 12, 16, 20
True or false: a prime number only has ONE factor pair.
True
What is the definition of a composite number?
A number that has more than 1 factor pair.
What is the product (multiplication) of the first 2 prime numbers?
6; 2x3=6
What are the factors of 18?
1, 18
2, 9
3, 6
True or false: 48 is a multiple of 12.
True
Is 27 a prime number? Explain why.
List 5 composite numbers between 0-20.
4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20
Which number is both a factor of 20 and a multiple of 5?
5 or 10
Which number has more factors, 12 or 15?
12 because 1, 2, 3, 4, 6, and 12 are all factors and 15 only has 1, 3, 5, and 15
What is the first multiple that 4 and 3 have in common (hint, list out both multiples and find the first one that is the same)?
12
List all the prime numbers between 2 and 20.
2, 3, 5, 7, 11, 13, 17, 19
Is 25 a composite number? Explain why.
Yes because it has more than 1 factor pair (1, 25, 5, 5)
Yes because 50/5= 10, so each player would get 10 cards.
What are the factors of 24?
1, 24
2, 12
3, 8
4, 6
List all the multiples of 7 up to 70.
7, 14, 21, 28, 35, 42, 49, 56, 63, 70
Is 48 a prime number? Explain why.
No, because it has more than 1 factor pair. (1, 48, 2, 24, 3, 16, 4, 12, 6, 8)
Is 51 a prime or composite number? Explain how you know.
Composite; there is more than 1 factor pair (1, 3, 17, 51)
A teacher has 45 cupcakes and 12 students. Can she give out the cupcakes so that each student gets the same amount?
No, you cannot divide 45 by 12. Some would get more than others.
1, 36
2, 18
3, 12
4, 9
6, 6
What multiple do 3, 4, and 5 have in common? (Hint, list out the multiples of each and find the one that is the same).
60
List 5 prime numbers between 20-100.
List 5 composite numbers between 20-100.
What is the first multiple that 9 and 12 both have in common?
36