Of the 3 friends, Harry has 4 times as many fish as Joe, and Joe has 8 times as many fish as Sam does. If Sam has 7 fish, how many fish does Harry have?
Let's think: Joe has 8 * 7 = 56 fish. Harry has 4 * 56 = 224 fish.. The answer is: 224.

4 students participated in a 200m race. If the average completion time of the last three students was 35 seconds, and the average completion time of all four runners was 30 seconds, how long (in seconds) did it take the student who came first to finish the race?
Let's think: The last 3 students had an average completion time of 35 seconds so the sum of their completion times was 3 * 35 = 105 seconds. All 4 students (now including the student who came first) had an average completion time of 30 seconds, meaning the sum of their completion times is 4 * 30 = 120 seconds. The student who came first spent 120 - 105 = 15 seconds in the race.. The answer is: 15.

In Mariam's neighborhood, there are 40 houses on one side of the main road passing through the neighborhood and three times as many homes on the other side of the road. How many homes are in Mariam's neighborhood?
Let's think: If the number of homes on one side of the main road is three times the number on the other side, there are 3 * 40 = 120 homes. In total, there are 40 + 120 = 160 homes in Mariam's neighborhood.. The answer is: 160.

James buys steaks for buy one get one free. The price is $15 per pound and he buys 20 pounds. How much did he pay for the steaks?
Let's think:
He pays for 20 / 2 = 10 pounds of steaks. That cost 10 * 15 = $150.. The answer is: 150.