First find the total number of minutes Gretchen spends sitting at her desk: 6 hours * 60 minutes / hour = 360 minutes. Then divide this amount by 90 minutes to find how many walking breaks Gretchen takes: 360 minutes / 90 minutes / break = 4 breaks. Then multiply the number of breaks by the length of each break to find how long Gretchen spends walking: 4 breaks * 10 minutes / break = 40 minutes.
The answer: 40
Reverse engineering the question: Gretchen read that you should spend 10 minutes walking for every 90 minutes you spend sitting. If Gretchen spends 6 hours working at her desk, how long will she spend walking?

The 5 - minute commercials were 3 * 5 = 15 minutes in total. The 2 - minute commercials were 2 * 11 - 22 minutes in total. The commercial break was 15 + 22 = 37 minutes long.
The answer: 37
Reverse engineering the question: During a commercial break in the Super Bowl, there were three 5-minute commercials and eleven 2-minute commercials. How many minutes was the commercial break?

Females:240(.60) = 144. Females on Jays side: 144(.50) = 72.
The answer: 72
Reverse engineering the question: Mary and Jay are planning a wedding. Of the 240 guests, 60 percent are female. Of the females, 50 percent are from Jay's family. How many female guests are from Jay's family?

On Monday there are 20 / 100 * 25 = 5 cars passing the street less than on Tuesday. So on Monday, there are 25 - 5 = 20 cars on Happy Street. On Wednesday, there are 20 + 2 = 22 cars on this street. On Thursday and Friday, there is a total of 10 * 2 = 20 cars passing. On the weekend 5 * 2 = 10 cars are passing. So from Monday through Sunday, there are 20 + 25 + 22 + 20 + 10 = 97 cars traveling down the street.
The answer: 97
Reverse engineering the question:
There is very little car traffic on Happy Street. During the week, most cars pass it on Tuesday - 25. On Monday, 20% less than on Tuesday, and on Wednesday, 2 more cars than on Monday. On Thursday and Friday, it is about 10 cars each day. On the weekend, traffic drops to 5 cars per day. How many cars travel down Happy Street from Monday through Sunday?