Numerical Expressions And Factors Question Preview (ID: 46643)


Greatest Common Factor (GCF) And Least Common Multiple (LCM). TEACHERS: click here for quick copy question ID numbers.

Find the GCF of 24 and 40
a) 4
b) 2
c) 8
d) 12

Find the GCF of 12 and 56
a) 7
b) 4
c) 8
d) 2

Find the GCF of 20 and 45
a) 5
b) 4
c) 2
d) 10

Find the GCF of 32 and 90
a) 4
b) 9
c) 8
d) 2

Find the GCF of 45,75, and 120
a) 25
b) 5
c) 15
d) 10

Find the LCM of 4 and 6
a) 12
b) 24
c) 28
d) 36

Find the LCM of 16 and 20
a) 80
b) 40
c) 32
d) 78

Find the LCM of 24 and 90
a) 120
b) 360
c) 240
d) 720

Find the LCM of 4,15, and 18
a) 90
b) 120
c) 180
d) 270

Find the LCM of 30,50, and 75
a) 375
b) 300
c) 425
d) 150

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) 90 seconds
b) 2 minutes
c) 80 seconds
d) 3 minutes

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