Answer the following question.
Keegan is in school for 7.5 hours each day and he is taking 7 classes. He has history and chemistry classes for a combined total of 1.5 hours. How many minutes does Keegan spend in one of his other classes on average?
Step-by-step reasoning process: He has 7 - 2 = 5 other classes. 7.5 hours - 1.5 hours = 6 hours. 6 hours = 360 minutes. 360 / 5 = 72 minutes. Keegan spends 72 minutes in one of his other classes.
The answer is 72.

Answer the following question.
There are enough provisions in a castle to feed 300 people for 90 days. After 30 days, 100 people leave the castle. How many more days are left until all the food runs out?
Step-by-step reasoning process: After 30 days, there will be enough food left to sustain 300 people for 90 days – 30 days = 60 days. After the 100 people leave, there will be 300 - 100 = 200 people left. The 200 people will eat 200 / 300 = 2 / 3 as much food as the original group of people in the castle. The 60 days' worth of food will last this smaller group for 60 days / (2 / 3) = 90 more days.
The answer is 90.

Answer the following question.
John decides to trade in his stereo system. His old system cost 250 dollars and he got 80% of the value for it. He then buys a system that costs $600 that he gets a 25% discount on. How much money came out of his pocket?
Step-by-step reasoning process: He got 250 * .8 = $200. He gets a 600 * .25 = $150 discount on the second system. So it cost 600 - 150 = $450. So he was 450 - 200 = $250 out of pocket.
The answer is 250.

Answer the following question.
Jamie is a firefighter. One day an emergency call comes in from Mrs. Thompson, an elderly woman whose cat can't get down a 20-foot tree. The last time Jamie rescued a cat, he got it down from a 6-foot tree and had to climb 12 rungs of his ladder. How many rungs does he have to climb this time to get the cat down from the tree?
Step-by-step reasoning process: Jamie needed 12 / 6 = 2 rungs per foot of the tree to save the first cat. To climb a 20 - foot tree, Jamie needs 20 * 2 = 40 rungs.
The answer is 40.