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Instruction:
Question 1
What is the least common multiple of 4, 5, and 16?
A.  30 B.  45
C.  56 D.  80
Question 2
Find the least common multiple of 15 and 20
A.  30 B.  40
C.  60 D.  80
Question 3
Which list shows the factors of 32?
A.  1, 2, 4, 8 B.  1, 3, 6, 8
C.  1, 5, 7, 9 D.  1, 2, 4, 6
Question 4
Select the CORRECT statement.
A.  A composite number is any number that has less than two factors. B.  A composite number has only two factors, one and itself.
C.  A composite number is any number that has more than two factors. D.  A prime number is any number that has more than two factors.
Question 5
Find the least common multiple of 3, 9, 21?
A.  45 B.  63
C.  42 D.  56
Question 6
The prime factors of 24 are ____________.
A.  2 × 2 × 2 × 2 B.  2 × 2 × 2 × 5
C.  2 × 3 × 3 × D.  2 × 2 × 2 × 3
Question 7
What is the least common multiple of 9 and 12?
A.  18 B.  36
C.  45 D.  63
Question 8
Which of these is a prime number?
A.  19 B.  18
C.  21 D.  22
Question 9
Lauren has Taekwondo class every 3 days and guitar lesson every 5 days. If she had both a Taekwondo class and a guitar lesson on Monday, in how many days will she have both on the same day again?
A.  12 B.  10
C.  15 D.  16
Question 10
Which list shows the factors of 28?
A.  1, 2, 3, 5, 12 B.  7, 14, 21
C.  2, 7, 14, 18 D.  1, 2, 4, 7, 14, 28
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