Factors
What are the factors of 2?
1 and 2
What are the first 5 multiples of 2?
2, 4, 6, 8, 10
Is 8 prime or composite?
Composite- Factors are 1, 2, 4, and 8
True or False: All even numbers are composite.
False: All even numbers are composite except for 2
What is a prime number? Give an example?
A prime number only has 2 factors. Examples 1, 2, 3, 5, 7, 9
Which 2 factors does every number have? (Mr. Black calls them the "easy" factors")
1 and itself
What are the first 5 multiples of 9?
9, 18, 27, 36, 45
Is 27 prime or composite?
Composite- 1, 3, 9, 27
True or False: All odd numbers are composite.
False: Some odd numbers have other factors
I can divide the number of books evenly between 3 people. Could I have 12 books? Explain
Yes. because when I check the multiples of 3, it will hit 12. 3x4=12.
What are the factors for 9?
1, 3, and 9
What are the first 10 multiples of 4?
4, 8, 12, 16, 20, 24, 28, 32, 36, 40
Is 30 prime or composite? What are the factors?
Composite: 1, 2, 3, 5, 6, 10, 15, 30
Which of the below are true?
A - 3 is a factor of 21
B - 21 is a factor of 3
C - 21 is a multiple of 3
D - 3 is a multiple of 21
I can divide the number of pencils evenly between 6 people. Could I have 13 pencils? Explain
No, 13 is prime and it would go 6, 12, 18
What are the factors for 40?
1, 2, 4, 5, 8, 10, 20, 40
Is 85 a multiple of 7? Explain
No, 7 would go to over. It would go 70, 77, 84, 91
Is 49 prime or composite? Give me the factor pairs.
Composite 1 and 49 are paired, 7 and 7 are paired.
True or False: You don't use factors when you are dividing.
False: Division problems use factors all the time!
Name the first 9 multiples of 11
11, 22, 33, 44, 55, 66, 77, 88, 99
What are the factors for 500?
1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500
Is 7,983,470 a multiple of 5? How do you know?
Yes, all multiples of 5 end in a 5 or a 0 in the ones place.
What are some factor pairs for 1000? Each factor pair is worth 100 points.
1 and 1000, 2 and 500, 4 and 250, 5 and 200, 8 and 125, 10 and 100, 20 and 50, 25 and 40
Which of the below are true?
A - 2 is a factor of 200
B - 1 is a factor of 15
C - The only factor pair of 35 is 1 and 35
D - The factor pairs of 10 are 1 and 10 and 2 and 5
A, B, D
I can divide the number of Jolly Ranchers evenly by 2, 5, and 6 people. What number could I have?
30, 60, 90...