[Question]There were 50 candies left in a bowl after Shelly ate 20 candies the previous week. Her friend comes over, bringing twice as much candy as she originally had. Shelly adds this to the bowl and they decide to divide them equally. How much candy did her friend have after eating 10 of her candies?
[Answer]The total number of candies Shelley had before eating some is 50 + 20 = 70 candies. When her friend came over, she brought 2 * 70 = 140 candies. The total number of candies in the bowl is now 140 + 50 = 190 candies. When they divide this equally between them, each gets 190 / 2 = 95 candies. When Shelly’s friend eats 10 of her candies, she still has 95 - 10 = 85 candies. The answer is 85.
Q: John books 3 nights at a hotel room for $250 a night. He has a $100 discount. How much does he pay?
A: The cost is 250 * 3 = $750. So he spends 750 - 100 = $650. The answer is 650.
Question: Bob wants to build a pyramid out of legos with 3 levels where the bottom level has 7 legos per side and each level has one less lego per side than the level below it. How many legos total will he need?
Answer: First find the total number of legos on the bottom layer: 7 legos * 7 legos = 49 legos. Then find the number of legos per side on the next layer: 7 legos - 1 lego = 6 legos. Then find the total number of legos on the second level: 6 legos * 6 legos = 36 legos. Then find the number of legos per side on the top level: 6 legos - 1 lego = 5 legos. Then find the total number of legos on the top level: 5 legos * 5 legos = 25 legos. Then add the number of legos on each level to find the total number of legos: 49 legos + 36 legos + 25 legos = 110 legos. The answer is 110.
[Question]John has a very inefficient toilet that uses 5 gallons of water per flush and his household flushed 15 times per day. He replaced it with a toilet that uses 80% less water per flush. How much water did John save in June?
[Answer]He used to use 5 * 15 = 75 gallons of water per day. This means he used 75 * 30 = 2250 gallons a month. His new toilet uses 5 * .8 = 4 gallons less water per flush. So, it only uses 5 - 4 = 1 gallon per flush. That means he uses 1 * 15 = 15 gallons per day. All in all, it accounts for a total usage of 15 * 30 = 450 gallons. So, he saved 2250 - 450 = 1800 gallons per month. The answer is 1800.
Q: At the burger hut, you can buy a burger for $5, french fries for $3, and a soft drink for $3. If you order a special burger meal, you get all 3 of these food items for $9.50. A kid’s burger is $3, a kid’s french fries are $2, and a kid's juice box is $2. They also have a kids meal of all 3 kids' food items for $5. Mr. Parker buys 2 burger meals for his wife and himself. He also buys 2 burger meals and 2 kid's meals for his 4 children. How much money does Mr. Parker save by buying the 6 meals versus buying the individual food items?
A: To buy regular food items individually, they cost $5 + $3 + $3 = $11. To buy kids food items individually, they cost $3 + $2 + $2 = $7. If you buy the special burger meal, you save $11 - $9.50 = $1.50. If you buy the kid's meal, you save $7 - $5 = $2. Mr. Parker buys 4 special burger meals, bringing his discount to 4 x $1.50 = $6. He buys 2 kid's meals, bringing his discount to 2 x $2 = $4. The total savings for Mr. Parker is $6 + $4 = $10. The answer is 10.
Question: Hazel put up a lemonade stand. She sold half her lemonade to a construction crew. She sold 18 cups to kids on bikes. She gave away half that amount to her friends. Then she drank the last cup of lemonade herself. How many cups of lemonade did Hazel make?
Answer:
Hazel sold 18 cups of lemonade to kids on bikes and gave half that amount, or 18 / 2 = 9 cups, away to friends. Hazel sold 18 cups + gave away 9 cups + drank 1 cup = 28 cups. Since Hazel sold half her lemonade to a construction crew, that means the 28 cups she sold to kids on bikes, gave away to friends and drank herself are the other half, so she sold 28 cups to the construction crew. In all, Hazel sold 28 + 28 = 56 cups of lemonade. The answer is 56.