Unit 4 Test Review

28 girls and 32 boys volunteer to plant trees at a school. The principal divides the girls and boys into groups with the same number of boys and girls. What is the greatest number of groups the principal can make?

• 4 groups

• 7 groups

• 2 groups

• 9 groups

What is the reciprocal of 5?

Solve and SIMPLIFY

Two neon signs are turned on at the same and begin to blink.  One sign blinks every 9 seconds.  The other blinks every 15 seconds.  In how many seconds will they blink together again?

• 3 seconds

• 5 seconds

• 45 seconds

• 135 seconds

Solve and SIMPLIFY.

• 1

Henry and Margo both began traveling around a circular track. Henry is riding his bike, and Margo is walking. It takes Henry 7 minutes to make it all the way around, and Margo takes 12 minutes. How much time will pass until they meet again at the starting line?

• 84 minutes
• 48 minutes
• 854 minutes
• 78 minutes

• 5
• 25

• 13 pieces

• 6 pieces

• 9 pieces