Factors
Multiples
Prime and Composite Numbers
Problem Solving
Mixed Review
100
Which number has the most factors: 8, 11, 25
8. 1, 2, 4, 8
100
Is 28 a multiple of 7?
Yes because 7 x 4 = 28
100
Is 43 prime or composite?
Prime
100
Is 32 a factor or multiple of 8?
A multiple. 8 x 4 = 32
100
89,541 - 23,667
65,874
200
Name all the factors of 21.
1, 3, 7
200
Choose the multiples of 9: 1, 3, 9, 18, 27, 82, 64
9, 18, and 27
200
Is 1 prime, composite, or neither? Explain.
It is neither because it only has one factor--1!
200
Is 5 a factor or a multiple of 30?
A factor. 5 x 6 = 30
200
Add 9,082 + 1,664
10,746
300
Which number has only 2 factors: 15, 21, 13
13. The only factors are 1 and 13.
300
Write 5 multiples of 6.
6, 12, 18, 24, 30, 36, 42, 48, 54, 60, 66, 72, ...
300
What is the ONLY prime number that is also an even number?
2
300
Jared says all multiples of 3 are odd. Is he correct? If not, explain.
He is not correct. Some multiples of 3 are even. If you multiply 3 by an even number, the product is even. For example, 3 x 4= 12
300
What is 173,404 rounded to the nearest ten thousand?
173,000
400
What are the factors (or factor pairs) for 27?
1 x 27 3 x 9
400
Name a multiple of both 3 and 5.
15, 30
400
Find the 3 composite numbers: 3, 81, 64, 23, 55
81, 64 and 55
400
Name 2 factors and 2 multiples of 12.
Factors: 1, 2, 3, 4, 6, 12 Multiples: 12, 24, 36, 48, ...
400
What is the relationship between the 7s in 23,775?
700 is 10 times greater than 70
500
List all of the factors (or factor pairs) for 36. (Remember...since it is an even number, it must have 2 as a factor!)
1 x 36 2 x 18 3 x 12 4 x 9 6 x 6
500
Which of the following is NOT a multiple of 7: 42, 35, 14, 48
48
500
Find the 3 prime numbers: 15, 17, 27, 31, 51, 72, 9
17, 31, and 51
500
Janine says every number in the 30s is prime. Jackie says this is not true. Who is correct? Explain.
Jackie is correct. This NOT true. Only 31 and 37 are prime.
500
Write 23,566 in expanded form.
20,000 + 3,000 + 500 + 60 + 6
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