Jacob is making s'mores. Each s'more takes two graham crackers and one marshmallow. If Jacob has 48 graham crackers and 6 marshmallows, how many more marshmallows does he need to buy? Give the rationale and then the answer.
Let's think step by step. First find the number of marshmallows Jacob needs: 48 graham crackers / 2 graham crackers / marshmallow = 24 marshmallows. Then subtract the number of marshmallows Jacob already has from the number he needs to find the number he needs to buy: 24 marshmallows - 6 marshmallows = 18 marshmallows.. The answer is: 18.

Daisy’s milk cow provides 16 cups of milk per day. 75% of the milk is consumed by Daisy’s kids. Daisy uses 50% of the remaining milk to cook with. How much milk is left over? Give the rationale and then the answer.
Let's think step by step. The cow provides 16 cups of milk per day and the kids consume 75% so they drink 16 * .75 = 12 cups of milk. The cow provides 16 cups of milk and the kids drink 12 cups leaving 16 - 12 = 4 cups of milk. Daisy uses 50% of the remaining 4 cups of milk to cook with so she uses .50 * 4 = 2 cups of milk. She had 4 cups of milk and used 2 cups to cook with so that leaves 4 - 2 = 2 cups of milk.. The answer is: 2.

Rick has 130 cards. He decided to only keep 15 cards and so he gave Miguel some of the cards. Then, he saw 8 friends and decided to give them 12 cards each, and the remaining cards were given equally to his 2 sisters. If each of Rick's sisters got 3 cards, how many cards did Rick give to Miguel? Give the rationale and then the answer.
Let's think step by step. After keeping 15 cards, Rick had 130 cards - 15 cards = 115 cards left. The total number of cards given by Rick to his 8 friends was 8 friends x 12 cards / friend = 96 cards. There were 2 sisters x 3 cards / sister = 6 cards given to Rick's sisters. So, there were 96 cards + 6 cards = 102 cards left after Rick gave Miguel some cards. Therefore, 115 cards - 102 cards = 13 cards were given to Miguel.. The answer is: 13.