Factors
Write 3 factors for 16
1, 2, 4, 8, 16
Write 3 multiples for 16
16, 32, 48
Nolan says all even numbers less than 10 are composite. Find and even number less than 10 that is NOT composite. Explain why it is not composite.
2. The only factors for 2 are one and itself (1,2)
Why is 1 neither prime nor composite?
Because it does not have 2 or more factors. It only has itself.
Draw all the possible arrays for 12
1x12, 12x1, 2x6, 6x2, 3x4, 4x3
List all the factors for 36
1,2,3,4,9, 12,18,36
List 5 multiples for 10
10, 20, 30, 40, 50
Write the factors of 21 that are prime.
3, 7
List 3 prime numbers.
Answers vary
Draw all the arrays for 29.
1x29, 29x1
List all the factors for 42
1, 2,3,6, 7, 14,21,42
List 5 multiples for 17
17, 34, 51, 68, 85
Which statement is true?
A.) The only factors for 6 are 6 and 1;therefore, 4 is composite.
B.) The only factors for 5 are 5 and 1; therefore, 5 is prime.
C.) The only factors for 14 are 14 and 1; therefore 14 is prime.
D. The only factors for 11 are 11 and 1; therefore 11 is composite.
B
Select all true statements.
A.) 51 is a composite number
B.) 39 is a multiple of 13
C.) 2 is a factor of 37
D.) 65 is a prime number
E.) One of the factors for 54 is an odd number.
A, B, E
List all the possible arrays for 55.
1x55, 55x1, 5x11, 11x5
List all of the factors 18.
1, 2, 3, 6, 9, 18
Moreno's Bakery sells cookies in packs of 4. A caterer needs between 32 and 42 cookies for dessert. Name two possible numbers between 32 and 42 that are multiples of 4.
36 because 4x9 is 36
40 because 4x10 is 40
Determine if each number is prime or composite. Then write all the factors for each number.
17, 39
17
(1,17)
39
1, 3, 13, 39
Select all equations that have a dividend as a multiple of 3 and a quotient as a factor of 36.
A.) 36 divided by 6= 2
B.) 12 divided by 6= 2
C.) 30 divided by 3= 10
D.) 24 divided by 8 = 3
E.) 18 divided by 3= 6
A, B, D, E
1X51, 51X1, 3x17, 17x3
Kelly says factors and multiples are related. Use the equation 9x 5= 45 to describe the relationship between factors and multiples.
9 and 5 are factors of 45. Since 9 and 5 are factors of 45, 45 is a multiple of both 9 and 5.
Write two multiples 6 that have a factor of 5. Use equations to explain
30 and 60
6x5=30
6x10=60
both end in zero or five, so they will have a factor of 5.
Which list all the factors of 42 that are also composite numbers.
A.) 1, 42
B.) 1, 2, 3, 6, 7
C.) 6, 14,21, 42
D.) 1,2,3,6,7,1,21,42
C
Determine whether the numbers in each list are factors or multiples of 20.
1.) 1, 20
2.)2,10
3.) 20, 40, 60
4.) 4, 5
1.) Factors
2.) Factors
3.) Multiples
4.) Factors
Mrs. Purkey has 54 music stands to arrange into an array in the music room. How many arrays can Mrs. Purkey make? List all the possible arrays.
8 arrays
1x54, 54x1, 2x27, 27x2, 3x18, 18x3, 6x9, 9x6
Daily Double- How many factors are there for 54? What are they? What do you notice about the number arrays and number of factors?