[Question]: A big box store sees 175 people enter their store every hour. This number doubles during the holiday season. During the holiday season, how many customers will this big box store see in 8 hours?
[Answer]: They see 175 people per hour and this number doubles during the holiday season so that's 175 * 2 = 350 people per hour. In an 8 hour day, if 350 people visit every hour then they will see 8 * 350 = 2,800 people in 8 hours.
So the answer is 2800.

[Question]: Mark is 7 years older than Amy, who is 15. How old will Mark be in 5 years?
[Answer]: Mark is 15 years + 7 years = 22 years old. In 5 years, he will be 22 years + 5 years = 27 years old.
So the answer is 27.

[Question]: Mr. Maxwell takes 1 hr to drive to work in the morning but 1 and half hours to drive back home in the evening. If the morning and evening traffic is similar and he drives at an average speed of 30mph in the morning, what is the average speed of his return journey?
[Answer]:
In the morning he travels at an average speed of 30mph for 1 hour so he covers a distance of 30 * 1 = 30 miles. He covers the same distance of 30 miles in the evening spending 1.5 hours so his average speed must be 30 / 1.5 = 20mph.
So the answer is 20.