Question: Karina was born in 1970 and she is currently twice as old as her brother. If her current age is 40, in what year was her brother born?
Answer: Step-by-step reasoning process: If Karina is currently 40, and she is twice as old as her brother, then her brother is currently 40 / 2 = 20 years old. If Karina was born in 1970, then her brother was born in 1970 + 20 = 1990.
So the answer is 1990.

Question: Mark is injured so decides to spend more time reading. He used to read 2 hours a day but increased that by 150%. Before he read 100 pages a day. How many pages does he read a week now?
Answer: Step-by-step reasoning process: His reading speed is 100 / 2 = 50 pages a day. He reads 2 * 1.5 = 3 hours more now than before. So now he reads 2 + 3 = 5 hours per day. That means he reads 5 * 50 = 250 pages per day. So he reads 250 * 7 = 1750 pages a week.
So the answer is 1750.

Question: Mike decides to do more pull-ups to increase his strength for climbing. He uses the greasing the groove technique where every time he goes into a certain room he does 2 pull-ups. He decides to use his office. He goes in there 5 times a day every day. How many pull-ups does he do a week?
Answer: Step-by-step reasoning process: He does 5 * 2 = 10 pull - ups a day. So he does 10 * 7 = 70 pull - ups a week.
So the answer is 70.

Question: 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?
Answer:
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.
So the answer is 8.