Come up with a question and reasoning that would justify this answer: 20
Question and rationale: The question is: Markus is twice the age of his son, and Markus's son is twice the age of Markus's grandson. If the sum of the ages of Markus, his son, and his grandson is 140 years, then how many years old is Markus's grandson?
Step-by-step reasoning process: Let "x" be the age of Markus's grandson. If Markus's son is twice the age of Markus's grandson, then Markus's son is 2 * x. If Markus is twice the age of his son, then Markus is 2 * 2 * x. Therefore, if the sum of the ages of Markus, his son, and his grandson is 140 years, then x + (2 * x) + (2 * 2 * x) = 140 years. Simplifying the equation, we see that 7 * x = 140 years. Therefore, the age of Markus's grandson is x = 20 years old.

Come up with a question and reasoning that would justify this answer: 110
Question and rationale: The question is: A certain school bought 10 cases of bottled water for their athletes. There are 20 bottles in each case. Seventy bottles of water were used during the first game. After the second game, only 20 bottles of water were left. How many bottles of water were used during the second game?
Step-by-step reasoning process: The school bought 10 x 20 = 200 bottled water. There were 200 - 70 = 130 bottled water left after the first game. So, there were 130 - 20 = 110 bottled water used during the second game.

Come up with a question and reasoning that would justify this answer: 130
Question and rationale: The question is: Samuel is driving to San Francisco's Comic-Con in his car and he needs to travel 600 miles to the hotel where he made a reservation. At first, he drives at 50 miles/hour for 3 hours straight, then he speeds up to 80 miles/hour for 4 hours. How far is he from the hotel?
Step-by-step reasoning process: At first at 50 miles / hour he travels 50 miles / hours * 3 hours = 150 miles. After that, he speeds up, traveling 80 miles / hours * 4 hours = 320 miles. He travels a total of 150 miles + 320 miles = 470 miles. He is 600470 = 130miles from the hotel.

Come up with a question and reasoning that would justify this answer: 8
Question and rationale:
The question is: Jeanne wants to ride the Ferris wheel, the roller coaster, and the bumper cars. The Ferris wheel costs 5 tickets, the roller coaster costs 4 tickets and the bumper cars cost 4 tickets. Jeanne has 5 tickets. How many more tickets should Jeanne buy?
Step-by-step reasoning process: The total number of tickets needed is 5 tickets + 4 tickets + 4 tickets = 13 tickets. Jeanne needs 13 tickets - 5 tickets = 8 tickets.