Answer this question:Chris buys 2 and a half dozen donuts on his way to work to share with his co-workers. While driving, he eats 10% of the donuts. Once inside, he grabs another 4 donuts for his afternoon snack. How many donuts are left for his co-workers?
He buys 2 and a half dozen donuts so that's 2.5 * 12 = 30 donuts. He eats 10% of the donuts on his way to work so he eats .10 * 30 = 3 donuts. He bought 30 donuts and ate 3 so that leaves 30 - 3 = 27 donuts. Once inside, he grabs another 4 donuts of his afternoon snack so that leaves 27 - 4 = 23 donuts for his co - workers.
The answer is 23.

Answer this question:Michelle had some leftover cans of silly string from her birthday party. She split them among Roger and 3 of his friends. Then Roger decided to give 2 of his cans to his brothers so that he now has 4 for himself. How many cans of silly string did Michelle have to start with?
Roger originally had 4 cans of silly string + 2 can he gave to his brothers = 6 cans. Since his friends received the same amount as Roger did originally, 3 friends x 6 cans of silly string = 18 cans. Michelle started with 6 cans that went to Roger + 18 cans that went to his friends = 24 cans of silly string.
The answer is 24.

Answer this question:Layla is training for a bicycle race. She rode her bicycle slowly to the high school, rode four miles around the running track at her faster, race pace, and then rode back home, slowly, on the same route. If her total mileage was 10 miles, how far is it, in miles, from Layla's house to the high school?
Layla rode 10 - 4 = 6 miles between home and the high school. Each leg of the round - trip journey was 6 / 2 = 3 miles.
The answer is 3.

Answer this question:The teacher told the class that if they averaged at least 75% on their final exam, they could have a pizza party. Everyone took the exam on Monday, except for William, who was allowed to take it on Tuesday. If there are 30 people in the class, and the average before he took the test was a 74%, what score does he have to get to make sure they get to have a pizza party?
Let x be the score that William needs to achieve. Since there are 30 people in the class, there are 30 - 1 = 29 people without him. Since their average was a 74%, this means that (29 * 74 + x) / 30 > = 75. Thus, 29 * 74 + x > = 30 * 75. Thus, 29 * 74 + x > = 2250. Thus, 2146 + x > = 2250. Thus, x > = 2250 - 2146. Thus, x > = 94.
The answer is 94.