Question 1

Which of the following is NOT a prime factor of 30?

Accepted Answer

7

Answer

3

Answer

5

Answer

2

Question 2

What is the greatest common factor between 12 and 15?

Accepted Answer

3

Answer

12

Answer

2

Answer

15

Question 3

What is the greatest common factor between 4 and 16?

Accepted Answer

4

Answer

16

Answer

8

Answer

1

Question 4

What is the prime factorization of 16?

Accepted Answer

2 x 2 x 2 x 2

Answer

4 x 4

Answer

2 x 2 x 4

Answer

2 x 2 x 2

Question 5

What is the prime factorization of 100?

Accepted Answer

2 x 2 x 5 x 5

Answer

2 x 5

Answer

2 x 2 x 2 x 5

Answer

2 x 5 x 5 x 5

Question 6

What is the greatest common factor between 42 and 63?

Accepted Answer

21

Answer

1

Answer

7

Answer

3

Question 7

What is the greatest common factor between 90 and 100?

Accepted Answer

10

Answer

20

Answer

2

Answer

5

Question 8

Is 91 prime?

Accepted Answer

no

Answer

yes

Question 9

Which of these is NOT a factor of 45?  (Not necessarily a prime factor.)

Accepted Answer

8

Answer

3

Answer

9

Answer

5

Question 10

Which of the following IS a factor of 60?

Accepted Answer

30

Answer

40

Answer

8

Answer

9

Question 11

What is the greatest common factor between 20 and 21?

Accepted Answer

1

Answer

5

Answer

3

Answer

2

Question 12

Which of these is prime?

Accepted Answer

53

Answer

39

Answer

33

Answer

44

Question 13

What is the greatest common factor between 33 and 99?

Accepted Answer

33

Answer

99

Answer

1

Answer

11

Question 14

What is the greatest common factor between 40 and 55?

Accepted Answer

5

Answer

1

Answer

15

Answer

40

Question 15

Which of these is the prime factorization of 66?

Accepted Answer

2 x 3 x 11

Answer

2 x 3 x 7

Answer

3 x 11

Answer

2 x 3 x 5

Question 16

Which of these is NOT a prime factor of 90?

Accepted Answer

7

Answer

3

Answer

2

Answer

5

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