Question: Three planes are going to the same place but each has a different number of passengers. The first plane has 50, the second had 60, and the third has 40. An empty plane can go 600 MPH, but each passenger makes it go 2 MPH slower. What is their average speed?
Answer: The first plane goes 100 MPH slower than empty because 50 x 2 = 100. The first plane goes 500 MPH because 600 - 100 = 500. The second plane goes 120 MPH slower because 60 x 2 = 120. The second plane goes 480 because 600 - 120 = 480. The third plane goes 80 MPH slower because 40 x 2 = 80. The third plane goes 520 MPH because 600 - 80 = 520. The total speed is 1500 because 500 + 480 + 520 = 1500. Their average speed is 500 because 1500 / 3 = 500. The answer is 500.

Question: Michael was watching a TV show, which was aired for 1.5 hours. During this time, there were 3 commercials, which lasted 10 minutes each. How long (in hours) was the TV show itself, not counting commercials?
Answer: Each commercial lasted 10 minutes, so three commercials lasted 3 * 10 = 30 minutes. The show was aired for 1.5 hours, and 30 minutes is 0.5 of an hour, so without the commercials, the show was 1.5 - 0.5 = 1 hour long. The answer is 1.

Question: Jebb buys $50 worth of food at a restaurant with a service fee of 12%. After paying, he gives a $5 tip. How much money did he spend at the restaurant?
Answer: Jebb paid $50 x 12 / 100 = $6 for service fee. He paid $50 + $6 = $56 for the food and the service fee. The total cost of everything is $56 + $5 = $61. The answer is 61.

Question: Jeremy's uncle gave him $50 to spend on basketball equipment. He bought 5 jerseys that cost $2 each, a basketball that cost $18, and a pair of shorts that cost $8. How much money does Jeremy have left?
Answer:
The cost of the jerseys is 5 jerseys × $2 / jersey = $10. The total cost of the jerseys, the basketball, and the shorts is $10 + $18 + $8 = $36. Jeremy has $50 - $36 = $14 left. The answer is 14.