Primes and Composites
(Answers will vary - 2, 3, 5, 7, 11, 13, 17, 19...)
List the factors of 6:
___, ____, ____, ____
1, 2, 3, and 6
Which is NOT a factor of 4?
A. 1
B. 2
C. 3
D. 4
C. 3
What is my favorite football team?
Buffalo Bills
two numbers that make a product are called...
a factor pair
How many factors do prime numbers have?
2
List the factors of 12:
____, _____, _____, _____, _____, _____
1, 2, 3, 4, 6, 12
Which is NOT a factor of 20?
A. 5
B. 10
C. 15
D. 20
C. 15
Max wants to save $40 to buy a new game. His plan is to save $5 the first week and then save $3 each week after that. Show Max's savings each week until he reaches his goal. How many weeks will it take Max to save $40?
A number is ( ) by another number if the quotient is a whole number and the remainder is 0.
divisible
Is 20 a prime or composite number?
Composite
List 4 factors of 100:
Five of the following: 1, 2, 4, 5, 10, 20, 25, 50, 100
Which is NOT a factor of 40?
A. 2
B. 5
C. 8
D. 9
D. 9
Greg says that he found a way to make a pattern that is only prime numbers. His pattern has a first term of 5 and a rule of "add 2". Is Greg correct? Explain how you know.
No, because his pattern will have the number 9 in it. 9 is not prime because it has more than one factor pair.
9=1x9
9=3x3
A ( ) number is a whole number greater that 1 that has exactly two factors
prime
What is the smallest prime number?
2
Is 11 a factor of 44? Explain why or why not.
Yes, because if we count by 11's we reach 44:
11, 22, 33 44
Which is NOT a factor of 50?
A. 3
B. 5
C. 10
D. 25
A. 3
What's the rule?
64, 32, 16
Divide by 2
A number found on the multiplication chart that is the product of two factors.
multiple
Is 500 prime or composite? Why?
Composite, because it has more than 2 factors
(2, 5, 10, 100, etc.)
List ALL the factors of 30.
1, 2, 3, 5, 6, 10, 15, 30
Which 2 numbers are NOT factors of 60?
9
10
11
12
9 and 11
Eric creates a pattern starting at 73 and follows the rule "subtract 4". Will the number 44 be in Eric's pattern?
NO
a whole number that has more that two factors
composite