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What is the GCF of 18 and 24?

• 3

• 6

• 8

• 9

What is the least common multiple (LCM) of 6 and 8?

• 6
• 8
• 48
• 24

Two neon signs are turned on at the same time.  Both signs blink as they are turned on.  One sign blinks every 9 seconds.  The other sign blinks every 15 seconds.  In how many seconds will they blink together?

• 30
• 45
• 50
• 90

Find the missing number using the distributive property.
10 + 20  =  2(5 +  __)

• 2
• 4
• 5
• 10

List the first 5 multiples of 20

• 1, 2, 4, 5, 10

• 1, 20, 2, 10, 4, 5

• 20, 40, 60, 80, 100

• 20, 25, 30, 35, 40