Q: Ronald is rolling a die and won't stop rolling until the average of all his rolls is a 3. He rolls a 1, a 3, a 2, a 4, a 3, a 5, a 3, a 4, a 4 and a 2. What does he need to roll on the next roll to be able to stop?
A: The next roll will be his 11th roll. The total on this tenth roll to have an average of 3 is 33, because 3 * 11 = 33. His current total is 31 because 1 + 3 + 2 + 4 + 3 + 5 + 6 + 1 + 4 + 2 = 31. He needs to roll a 2 because 33 - 31 = 2. The answer is 2.
Question: Jessie's community built a new hedge. Each section of the hedge used 30 pieces of concrete blocks that cost $2 per piece. The hedge has eight sections. How much did they spend on the concrete blocks?
Answer: They used 30 x 8 = 240 concrete blocks for the eight sections. So, they spent 240 x $2 = $480 on the concrete blocks. The answer is 480.
[Question]Donny saves $15 on Monday, $28 on Tuesday and $13 on Wednesday. On Thursday he spends half of his total savings so far. How much did he spend?
[Answer]Donny saves a total of $15 + $28 + $13 = $56 across all 3 days. He spends half of his total savings which is $56 * (1 / 2) = $28. The answer is 28.
Q: A Ferris wheel can accommodate 70 people in 20 minutes. If the Ferris wheel is open from 1:00 pm until 7:00 pm, how many people will get to ride?
A: The Ferris wheel will be open for 7:00 - 1:00 = 6 hours. In one hour the wheel can ride 60 minutes / 20 minutes = 3 times the number of riders. The total per hour riders is 3 * 70 people = 210 people. If the ride is open 6 hours * 210 people = 1260 people can ride. The answer is 1260.
Question: LaKeisha is mowing lawns to raise money for a collector set of books. She charges $.10 for every square foot of lawn. The book set costs $150. If she has already mowed three 20 x 15 foot lawns, how many more square feet does she have to mow to earn enough for the book set?
Answer: She has mowed 900 square feet because 3 x 20 x 15 = 900. She has earned $90 because 900 x .1 = 90. She has to earn $60 more dollars because 150 - 90 = 60. She has to mow 600 more square feet of lawns because 60 / .1 = 600. The answer is 600.
Q: Mary only has 8 screws on hand and needs to buy 2 times more to fix her sink. When she is beginning repairs, she has to split the screws into four sections. How many are in each pile?
A:
Mary originally had 8 screws, then went to buy twice more screws and ended up with 8 + (8 * 2) = 24 of them. She then split them into four piles of 24 / 4 = 6. The answer is 6.