Factors
Which of these is a factor of 8?
A. 3
B. 9
C. 4
C. 4
Is 12 a multiple of 2?
Yes
What is the only even prime number?
2
How many arcs does the rainbow model for 8 have?
2 arcs
1 and 8
2 and 4
Add the factors of 6 together.
1+2+3+6 = 12
What are the factors of 36?
1, 2, 3, 4, 6, 9, 12, 18, 36
Name three multiples of 5.
5, 10, 15, 20, 25, 30, 35, 40, ...
Which of these is a prime number?
A. 7
B. 4
C. 9
A. 7
How many arcs does the rainbow model for 24 have?
4
Add the factors of 13 together.
14
What number is a factor of ALL numbers?
1 is a factor of ALL numbers!
These are all multiples of what number?
12, 18, 24, 30, 36, 42...
6
Name all the composite numbers between 10 and 20.
10, 12, 14, 15, 16, 18, and 20
What is the middle arc for 25?`
5 and 5
What number do you get when you add all the factors of 41?
42
What are all the factors of 60?
1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 60
These are all multiples of what number?
30, 45, 60, 75, 90, 105, 120, 135, 150...
15
Which of these is a prime number?
A. 21
B. 17
C. 27
B. 17
What is the middle arc for the factor rainbow of 30?
5 and 6
How many factors does 67 have?
2: 1 and 67
What are all the factors of 360?
1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 90, 120, 180, and 360
These are all multiples of what number?
42, 63, 84, 105, 126, 147, 168, 189...
21
Which of these is a prime number?
A. 49
B. 57
C. 79
C. 79
What is the innermost factor pair on the rainbow model for 180?
12 x 15
How many of the factors of 12 are prime numbers?
Two factors of 12 are prime. (2 and 3)