Question: Donna made a cake to take to a party where the guests ate half the cake. The day after the party, she shared half the leftovers with her brothers. The following day, she ate one piece as a midnight snack. Twice as many pieces as her snack were left. How many pieces was the cake to begin with?
Answer with step-by-step thinking: Donna had 2 * 1 = 2 pieces of cake left. Before her snack, there were 2 + 1 = 3 pieces left. Those 3 pieces were half the leftovers, so she had 3 * 2 = 6 pieces before sharing with her brothers. Those 6 pieces were half the party leftovers, so the cake was 2 * 6 = 12 pieces before the party.
So the answer is 12.


Question: Artemis is making tea for a party. She knows her mom drinks an 8-ounce cup of tea and uses one ounce of tea. She will use this same ratio for the party. The party has 12 people there and each of them wants a 6-ounce cup of tea. How many ounces of tea does she need?
Answer with step-by-step thinking: She is making 72 ounces of water because 12 x 6 = 72. She needs 9 ounces of tea because 72 / 8 = 9.
So the answer is 9.


Question: Calvin buys a pack of chips, for $0.50, from the vending machine at lunch, 5 days a week. After 4 weeks, how much money has Calvin spent on chips?
Answer with step-by-step thinking:
The chips cost $0.50 a bag and he buys them 5 days a week so that's .50 * 5 = $2.50 a week. If he spends $2.50 on chips a week then over 4 weeks he will spend 2.50 * 4 = $10.00 on chips.
So the answer is 10.