Question: Libby has 160 quarters in her piggy bank. She has to pay $35 to replace her sister’s dress that she borrowed and ruined. After replacing the dress, how many quarters will Libby have left?
Answer with step-by-step thinking: There are 4 quarters in every dollar, so $35 x 4 = 140 quarters. Libby has 160 quarters – 140 quarters to repay her sister = 20 quarters left.
So the answer is 20.


Question: John buys 3 puzzles. The first puzzle has 1000 pieces. The second and third puzzles have the same number of pieces and each has 50% more pieces. How many total pieces are all the puzzles?
Answer with step-by-step thinking: The second puzzle has 1000 * .5 = 500 more pieces than the first. So it has 1000 + 500 = 1500 total pieces. That means those two puzzles have 1500 * 2 = 3000 pieces. So in total there were 3000 + 1000 = 4000 pieces.
So the answer is 4000.


Question: James buys pistachios for $10 per can. Each can is 5 ounces. He eats 30 ounces of pistachios every 5 days. How much does he spend on pistachios per week?
Answer with step-by-step thinking:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
The pistachios cost 10 / 5 = $2 per ounce. He eats 30 / 5 = 6 ounces of pistachios a day. So he spends 6 * 2 = $12 per day on pistachios. So he spends 12 * 7 = $84 per week.
So the answer is 84.