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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?
36
80
2
4
5
150
15
2 minutes
Find the GCF of 20 and 45
36
80
2
4
5
150
15
2 minutes
Find the LCM of 16 and 20
36
80
2
4
5
150
15
2 minutes
Find the GCF of 12 and 56
36
80
2
4
5
150
15
2 minutes
Find the GCF of 32 and 90
36
80
2
4
5
150
15
2 minutes
Find the LCM of 4 and 6
36
80
2
4
5
150
15
2 minutes
Find the GCF of 45,75, and 120
36
80
2
4
5
150
15
2 minutes
Find the LCM of 30,50, and 75
36
80
2
4
5
150
15
2 minutes
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