Q: Molly and her parents love to hang out at the beach on weekends. Molly spent the better part of the day at the beach and saw 100 people join them. At 5:00, 40 people left the beach. What's the total number of people at the beach if they all stayed until evening?
A: 63
Step-by-step reasoning process: Molly and her parent were 2 + 1 = 3 people. When 100 more people joined, the total number became 3 + 100 = 103. If 40 people left before evening, the number reduced to 103 - 40 = 63 people.


Q: Jenny decided to get a cat with her girlfriend. They agreed to split all the costs down the middle except for they would each buy their own toys for the cat. The adoption fee was $50, the vet visits cost $500 for the first year and the monthly cost of food was $25. She bought $200 in toys. How much did Jenny spend on the cat in the first year?
A: 625
Step-by-step reasoning process: The total cost for food was 25 * 12 = $300. So their shared expenses were 300 + 50 + 500 = $850. So Jenny spent 850 / 2 = $425 on shared expenses. So the total cost she paid was 425 + 200 = $625.


Q: There are 480 zombies in the shopping mall. If the number of zombies doubled every day, how many days ago were there less than 50 zombies in the mall?
A: 4
Step-by-step reasoning process: First find how many zombies there were one day ago: 480 zombies / 2 = 240 zombies. Then find how many zombies there were two days ago: 240 zombies / 2 = 120 zombies. Then find the number of zombies there were three days ago: 120 zombies / 2 = 60 zombies. Then find the number of zombies there were four days ago: 60 zombies / 2 = 30 zombies, which is less than 50, so there were less than 50 zombies 4 days ago.


Q: In 6 months Bella and Bob will be celebrating their 4th anniversary. How many months ago did they celebrate their 2nd anniversary?
A: 18
Step-by-step reasoning process: First, we find their current point in time be realizing that 4 years is 4 sets of 12 months, meaning at that anniversary they will have been together 4 * 12 = 48 months. Then, we subtract their 6 month difference, finding they are at 48 - 6 = 42 months into their relationship. Since 2 years would be 2 * 12 = 24 months into the relationship. We take the larger number, 42, and subtract the smaller number, 24 to find the difference in months, meaning it is 42 - 24 = 18 months.