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Numerical Expressions And Factors
Test Description: Greatest Common Factor (GCF) and Least Common Multiple (LCM)
Instructions: Answer all questions to get your test result.
1) Find the GCF of 24 and 40
A
12
B
2
C
8
D
4
2) Find the GCF of 12 and 56
A
7
B
2
C
4
D
8
3) Find the GCF of 20 and 45
A
10
B
5
C
2
D
4
4) Find the GCF of 32 and 90
A
9
B
4
C
8
D
2
5) Find the GCF of 45,75, and 120
A
25
B
10
C
15
D
5
6) Find the LCM of 4 and 6
A
24
B
28
C
12
D
36
7) Find the LCM of 16 and 20
A
78
B
80
C
32
D
40
8) Find the LCM of 24 and 90
A
240
B
360
C
720
D
120
9) Find the LCM of 4,15, and 18
A
180
B
120
C
270
D
90
10) Find the LCM of 30,50, and 75
A
425
B
300
C
150
D
375
11) A traffic light changes every 30 seconds. Another traffic light changes every 40 seconds. Both lights just changed. After how many minutes will both lights change at the same time again?
A
2 minutes
B
80 seconds
C
90 seconds
D
3 minutes
*select an answer for all questions
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