[Question]Autumn was constantly misplacing her pencils. At the start of the school year, she purchased a pack of 20 pencils. In the first month of school, she misplaced 7 pencils, broke 3 pencils and had to throw them away, she found 4, and bought 2. How many pencils did Autumn have left?
[Answer]Autumn misplaced 7 and broke 3, so that lost her 7 + 3 = 10 pencils. Autumn found 4 pencils and bought 2, so she gained 4 + 2 = 6 pencils. She started with 20 pencils, lost 10 and gained 6 so she had 20 - 10 + 6 = 16 pencils left. The answer is 16.
Q: Ellie takes her little brother down to the pond to teach him how to skip stones. After he takes his first throw, she gives him pointers to improve his technique. His second throw skips two more times across the water than his first. His third throw skips twice as many times as his second. His fourth throw skips 3 fewer times than his third throw. His fifth throw skips one more time than the fourth throw. If his fifth throw skipped 8 times across the water, how many skips did he make in total between all of his throws?
A: His fourth throw made 8 - 1 = 7 skips. His third throw made 7 + 3 = 10 skips. His second throw made 10 / 2 = 5 skips. His first throw made 5 - 2 = 3 skips. The total number of skips is 8 + 7 + 10 + 5 + 3 = 33 skips. The answer is 33.
Question: Kevin repairs phones at his job. At the beginning of the day, Kevin has 15 phones that need to be repaired. By the afternoon, Kevin has successfully repaired 3 of the 15 phones and a client has dropped off 6 more phones that need fixing. If a coworker of Kevin's offers to help him and fix half of the damaged phones, how many phones will each person need to repair?
Answer: Kevin begins the day with 15 phones and repairs 3 by the afternoon, so Kevin still has to repair 15 - 3 = 12 phones. A client drops off 6 additional phones that require fixing, increasing the total to 12 + 6 = 18 phones. If Kevin's coworker helps Kevin fix half of the phones, then each person needs to fix 18 / 2 = 9 phones. The answer is 9.
[Question]There are 200 more red apples than green apples in a grocery store. A truck arrives and delivers another 340 green apples. If there were originally 32 green apples, how many more green apples than red apples are there in the store now?
[Answer]There are 200 + 32 = 232 red apples. After the delivery there are 340 + 32 = 372 green apples. There are now 372 - 232 = 140 more green apples than red apples now. The answer is 140.
Q: Every time Janet folds her blanket its thickness doubles. If it starts out 3 inches thick, how thick will it be after 4 foldings?
A: First find how thick the blanket will be after 1 folding: 3 inches * 2 = 6 inches. Then find how thick the blanket will be after 2 foldings: 6 inches * 2 = 12 inches. Then find how thick the blanket will be after 3 foldings: 12 inches * 2 = 24 inches. Then find how thick the blanket will be after 4 foldings: 24 inches * 2 = 48 inches. The answer is 48.
Question: The school is hosting a race after school. The winner is the person who runs the most laps around the school in 12 minutes. One lap around the school is 100 meters. The winner is awarded a gift certificate equal to $3.5 for every one hundred meters they run. The winner runs 24 laps around the school. On average, how much did they earn per minute?
Answer:
They ran 2,400 meters because 24 laps x 100 m / lap = 2400 m. They ran 200 meters per minute because 2400 m / 12 min = 200 m / min. For every minute they ran they earned an average of $7 because $3.5 / 100m x 200 m / min = $7 / min. The answer is 7.