Factors and Factor Pairs
The factor pairs for 14.
What is 1 and 14 & 2 and 7?
Use a T-Chart to write the factors for 8.
What is
1 x 8
2 x 4?
Write 4 multiples for 5.
What is 5, 10, 15, 20?
52 is a __________ number. (prime or composite)
What is composite?
(52 is even, therefore it will have more than two factors, 1, itself (52), and 2 x something).
List all the possible arrays for the number 9. Use a T-Chart to help you.
What is
1 x 9
9 x 1
3 x 3?
List the factors for the number 25.
What is 1, 5, 25?
Use a T-Chart to write the factors for 27.
What is
1 x 27
3 x 9 ?
Write 5 multiples of 3.
What is 3, 6, 9, 12, 15?
78 is a __________ number. (prime or composite)
What is composite?
78 is even, therefore it will be divisible by 2 and have 2 as one of its factors besides 1 and itself.
List all the possible arrays for the number 12. Use a T-Chart to help you.
What is
1 x 12
12 x 1
2 x 6
6 x 2
3 x 4
4 x 3?
How many factors does the number 30 have?
What is 8 factors?
(1, 2, 3, 5, 6, 10, 15, 30)
Use a T-Chart to write the factors for 24.
What is
1 x 24
2 x 12
3 x 8
4 x 6 ?
Write 6 multiples of 6.
What is 6, 12, 18, 24, 30, 36?
21 is ___________. (prime or composite)
What is composite?
make a T-chart to prove it!
1, 3, 7, 21 are all factors of 21! Since it has more than 2 factors, it is composite!
State the amount of arrays you can make for the number 21. Use a T-Chart to help you.
What is 4 arrays?
1 x 21
21 x 1
3 x 7
7 x 3
True or false: The only factors of 29 are 1 and 29.
What is true?
Use a T-Chart to help you find the factor pairs of 45.
What is
1 and 45
3 and 15
5 and 9 ?
True or false: the first 5 multiples of 7 are 1, 7, 14, 21, 28.
What is false?
1 is not a multiple of 7!
True or false: 2 is the smallest prime number.
What is true?
Remember, 2 only has 2 factors, 1 and itself. It is the only EVEN prime number.
State the number of arrays you can make for the number 18. Use a T-Chart to help you.
What is 6?
1 x 18
18 x 1
2 x 9
9 x 2
3 x 6
6 x 3
True or false: All the factors of 40 are 1, 2, 4, 5, 8, 10, 20, 40.
What is true?
SURPRISE. DOUBLE JEOPARDY.
Use the equation 4 x 3 = 12 to describe the relationship between factors and multiples.
What is
4 x 3 are factors of 12
and
12 is a multiple of 12 and 3?
True or false: the first 10 multiples of 4 are 4, 8, 12, 16, 20, 24, 28, 32, 38, 40.
What is false?
38 is not a multiple of 40!
71 is a ____________ number. (prime or composite)
What is prime?
True or false: using the number 18, the number of arrays for 18 is the same as the number of factors for 18.
What is true?
Factors: 1, 2, 3, 6, 9, 18 (6 factors)
Arrays: 1x18, 18x1, 2x9, 9x2, 3x6, 6x3 (6 arrays)