[Question]There are 20 hands in Peter's class, not including his. Assume every student in the class has 2 arms and 2 hands. How many students are in Peter's class including him?
[Answer]There are 20 + 2 of Peter's hands = 22 hands in Peter's class including his. There are 22 hands / 2 hands per student = 11 students. The answer is 11.

[Question]Mitch is a freelancer, she works 5 hours every day from Monday to Friday and 3 hours every Saturday and Sunday. If she earns $3 per hour and earns double on weekends, how much does she earn every week?
[Answer]Mitch earns 5 x $3 = $15 every weekday. So, she earns $15 x 5 = $75 from Monday to Friday. And she earns $3 x 2 = $6 per hour every weekend. Hence, the total amount she earns every weekend is $6 x 3 = $18. So, she earns $18 x 2 = $36 every Saturday and Sunday. Therefore, the total amount she earns every week is $75 + $36 = $111. The answer is 111.

[Question]Harry is counting the hours that he sleeps. On Monday night, he sleeps for 8 hours. On Tuesday night, he sleeps for 7 hours. On Wednesday night, he sleeps for 8 hours. On Thursday night, he sleeps for 10 hours. On Friday night he sleeps for 7 hours. What is the average number of hours that Harry sleeps in one night?
[Answer]Across Monday through Friday, the total number of hours Harry sleeps is 8 + 7 + 8 + 10 + 7 = 40 hours. The total number of days from Monday through Friday is 5 days. The average number of hours Harry sleeps in one night is 40 / 5 = 8 hours. The answer is 8.

[Question]An elementary school teacher is making Halloween goodie bags for her class. She wants the bags to be personalized, so she surveys her students asking whether they'd like a vampire-themed bag or a pumpkin-themed bag. Of her 25 students, 11 indicate they want the vampire-themed bag and 14 indicate they want the pumpkin-themed bag. The store the teacher shops at sells packs of 5 of each theme at a price of $3 per package, as well as individual bags of each theme at a price of $1 each. What is the least amount of money the teacher can spend on the bags if she buys every student the theme they requested?
[Answer]
Because it is cheaper to buy the packs of 5, the teacher should satisfy the 11 students who want the vampire theme with 2 packs of 5 and 1 individual bag. This will cost the teacher 2 * 3 + 1 * 1 = $7. Similarly, the 14 students who want a pumpkin - themed bag can be satisfied by 2 packs of 5 and 4 individual bags at a cost of 2 * 3 + 4 * 1 = $10. Therefore, the teacher must spend 7 + 10 = $17. The answer is 17.