[Question]Jeremy buys 3 bags of chips for a party. Stacy and Emily also buy chips for the party. If they need 10 bags of chips total, and Stacy buys 4 bags, how many bags of chips should Emily buy?
[Answer]Jeremy and Stacy buy 3 + 4 = 7 bags of chips. Since there needs to be 10 total, Emily should buy 10 - 7 = 3 bags of chips. The answer is 3.
Q: Every 10 seconds, there is a car collision, and every 20 seconds there is a big crash. How many accidents overall will happen in 4 minutes?
A: 1 minute is 60 seconds, so 4 minutes is 4 * 60 = 240 seconds. During this time there would be 240 / 20 = 12 big crashes. And also 240 / 10 = 24 car collisions. So in total during 4 minutes there would be 12 + 24 = 36 accidents. The answer is 36.
Question: Joe sells ham and cheese sandwiches for $1.50. If a slice of bread costs $0.15, a slice of ham costs $0.25 and a slice of cheese costs $0.35, how many cents does a sandwich with one slice of each protein cost Joe to make?
Answer: First find the cost of two slices of bread: $0.15 / slice * 2 slices = $0.30. Then add the cost of one slice each of ham and cheese: $0.30 + $0.25 + $0.35 = $0.90. The answer is 90.
[Question]A jewelry store is restocking its shelves. The necklace stand, which can hold 12 necklaces, currently holds 5 necklaces. The ring display, which can hold 30 rings, currently holds 18 rings. The bracelet display, which can hold 15 bracelets, currently holds 8 bracelets. The store’s supplier charges $4 per necklace, $10 per ring, and $5 per bracelet. How much, in dollars, will the store need to pay to fill the displays?
[Answer]The necklace stand needs another 12 – 5 = 7 necklaces. This will cost the store 7 * 4 = $28. The ring display needs another 30 – 18 = 12 rings. This will cost the store 12 * 10 = $120. The bracelet display needs another 15 – 8 = 7 bracelets. This will cost the store 7 * 5 = $35. In total, the store needs to pay 28 + 120 + 35 = $183. The answer is 183.
Q: Jane had a 500 page book to read. The first half of the book Jane read with a speed of 10 pages per day, and the second half with a speed of 5 pages a day. How many days did Jane spend reading this book?
A: Half of the book means 500 / 2 = 250 pages. Reading the first half took Jane 250 / 10 = 25 days. Reading the second half of the book took Jane 250 / 5 = 50 days. So in total Jane needed 25 + 50 = 75 days to read the whole book. The answer is 75.
Question: Stanley sold 4 cups of lemonade an hour. His brother, Carl, sold 7 cups of lemonade an hour. How many more cups did Carl sell than Stanley in 3 hours?
Answer:
Stanley sold 4 x 3 = 12 cups. Carl sold 7 x 3 = 21 cups. Carl sold 21 - 12 = 9 cups more than Stanley. The answer is 9.