Factors
Choose the letter that shows all the factors of 12.
A. 1,12
B. 1, 2, 3, 4, 6, 12
C. 1, 3, 6, 7, 12
D. 2, 4, 6, 12
B. 1x12, 2x6, 3x4
A. 1, 2, 4
B. 4, 8, 12, 16, 20
C. 1, 2, 3, 4
D, 1, 4, 8, 12, 16
B. 4, 8, 12, 16, 20
Is 31 prime or composite?
prime
Factors: 1, 31
425x4=
A. 1,700
B. 1,600
C. 1,435
D. none of the above
A.
321/3
A. 107
B. 107 R 1
C. 17
D. none of the above
A. 107
What are all the factors of 10.
A. 1, 2, 3, 4, 5
B. 2,4, 6, 8, 10
C. 1, 2, 5, 10
D. 2, 5
C. 1x10, 2x5
Which number is not a multiple of 10?
A. 10
B. 5
C. 20
D. 200
B. 5
True or false:
All odd numbers are prime
False
22x89
A. 1,892
B. 1,958
C. 1,780
D. none of the above
B. 1,958
455/5
A. 90
B. 91
C. 91 R 5
D. none of the above
B. 91
Which number is not a factor of 64?
A. 3
B. 8
C. 64
D. 32
A. 3
Which is a multiple of 10, but not a factor?
A. 10
B. 20
C. 5
D. 1
B. 20
composite
4562x6
A. 4,562
B. 27,323
C. 47,372
D. none of the above
27,372- none of the above
234/5
A. 111
B. 46
C. 46 R 4
D. none of the above
C. 46 R 4
Which number is not a factor of 108?
A. 2
B. 3
C. 108
D. 5
D. 5
Hint-numbers that are divisible by 5 end in 0 or 5
Which number is not a multiple of 80?
A. 160
B. 80
C. 240
D. 180
D. 180
True or False
2 is a composite number because it is even.
False-
2 only has two factors 1,2 which makes it a prime number.
46x87
A. 4,000
B. 4,002
C. 4,023
D. none of the above
B. 4,002
4789/9
A. 532
B. 52
C. 515
D. none of the above
D. 532 R 1
Choose all numbers that are factors of 255?
*Hint- use divisibility rules
A. 3
B. 5
C. 2
D. 10
A. 3 (2+5+5=12) 12 is divisible by 3
B. 5 (ends in a 5 or 0)
Which number is not a multiple of 5?
A. 5
B. 10
C. 455
D. 252
D. 252
Is 242 prime or composite?
composite
2345x5
A. 12,725
B. 11,723
C. 12,257
D. None of the above
D. 11,725
5932/8
A. 741
B. 742 R 5
C. 431 R 4
D. none of the above