Hayes does 3 loads of laundry a week using a detergent pod for each load. His detergent pods come 39 to a pack. How many packs of detergent pods will he need to do a full year of laundry? Give the rationale and then the answer.
Let's think step by step. He uses 3 detergent pods a week and there are 52 weeks in a year, so he uses 3 * 52 = 156. His detergent has 39 pods per pack and he needs 156 pods, so he will need 156 / 39 = 4 packs of detergent pods.. The answer is: 4.

Oleg is an event organizer. He is organizing an event with 80 guests where 40 of them are men, half the number of men are women, and the rest are children. If he added 10 children to the guest list, how many children will there be at the event? Give the rationale and then the answer.
Let's think step by step. There are 40 / 2 = 20 women at the event. Hence, there are a total of 40 + 20 = 60 men and women at the event. So, the total number of children at the event is 80 - 60 = 20. After Oleg added 10 children to the guest list, there are a total of 20 + 10 = 30 children.. The answer is: 30.

James listens to super-fast music. It is 200 beats per minute. He listens to 2 hours of music a day. How many beats does he hear per week? Give the rationale and then the answer.
Let's think step by step. He listens to 2 * 60 = 120 minutes of music a day. So he hears 200 * 120 = 24000 beats per day. That means he hears 24,000 * 7 = 168,000 beats per week.. The answer is: 168000.