Q: Jill bought 5 packs of red bouncy balls and 4 packs of yellow bouncy balls. Each package contained 18 bouncy balls. How many more red bouncy balls than yellow bouncy balls did Jill buy?
A: 18
Step-by-step reasoning process: Jill bought 5 packs * 18 red balls = 90 red balls. Jill bought 4 packs * 18 yellow balls = 72 red balls. Jill had 90 red 72 yellow = 18 more red balls.

Q: June made a design with 20 equal tiles. Three tiles are yellow and the number of blue tiles is one more than the number of yellow tiles. Six tiles are purple and the remaining tiles are white. How many white tiles are there?
A: 7
Step-by-step reasoning process: There are 3 + 1 = 4 blue tiles. There are a total of 3 + 4 + 6 = 13 tiles are yellow, blue, and purple. Hence, 20 - 13 = 7 tiles are white.

Q: Tom and Elizabeth have a competition to climb a hill. Elizabeth takes 30 minutes to climb the hill. Tom takes four times as long as Elizabeth does to climb the hill. How many hours does it take Tom to climb up the hill?
A: 2
Step-by-step reasoning process: It takes Tom 30 * 4 = 120 minutes to climb the hill. It takes Tom 120 / 60 = 2 hours to climb the hill.

Q: Mr. Caiden wants to do repairs to his house and requires 300 feet of metal roofing to do this. If each foot of roofing costs $8, and the supplier of the metal roofing brings in 250 feet of metal roofing for free, how much money is Mr. Caiden required to pay for the remaining metal roofing?
A: 400
Step-by-step reasoning process: The supplier brought 300 ft - 250 ft = 50 fewer feet of metal roofing. Therefore the total amount of money Mr. Caiden has to pay for the remaining metal roofings is 50 feet * $8 / foot = $400.