[Question]Nina wants to buy a new video game with her allowance money. The game cost 50 dollars. Nina also has learned that there is a 10 percent sales tax. She receives 10 dollars a week as an allowance, and thinks she can save half of that. How many weeks will it take for Nina to be able to buy the new video game with her savings?
[Answer]The 10 percent tax on 50 dollars will be 10 / 100 x 50 = 5 dollars. The cost of the game and the tax will be 50 + 5 = 55 dollars. Nina will save half of her allowance every week, or 10 / 2 = 5 dollars per week. The total cost of the game and tax, divided by Nina's weekly savings is 55 / 5 = 11 weeks. The answer is 11.

[Question]The cash price of a refrigerator was $8000. Samantha wanted to buy the refrigerator but pay in installments. If she paid a deposit of $3000 and paid 30 equal monthly installments of $300 each, calculate how much money she would have saved by paying cash.
[Answer]When Samantha paid $300 in 30 equal monthly installments, she paid a total of $9000. Since the higher purchase is a deposit plus the total monthly installments, Samatha paid $3000 + $9000 = $12000 for the refrigerator on higher purchase. If she would have bought the refrigerator on the cash prize, Samantha would have paid $12000 - to $8000 = $4000 less. The answer is 4000.

[Question]A hand-crank pencil sharpener can sharpen one pencil every forty-five seconds. An electric version can sharpen one in twenty seconds. How many more pencils can the electric sharpener sharpen than the hand-crank sharpener in six minutes?
[Answer]A minute is 60 seconds, so 6 minutes is 6 * 60 = 360 seconds. A hand - crank sharpener can sharpen 360 / 45 = 8 pencils in 6 minutes. An electric sharpener can sharpen 360 / 20 = 18 pencils in 6 minutes. Therefore, an electric sharpener can sharpen 18 - 8 = 10 more pencils than a hand - crank in 6 minutes. The answer is 10.

[Question]Scott runs 3 miles every Monday through Wednesday. Then he runs twice as far he ran on Monday every Thursday and Friday. How many miles will he run in a month with 4 weeks?
[Answer]
Scott runs 3 x 2 = 6 miles every Thursday and Friday. The total miles run by Scott for a week from Monday through Wednesday is 3 x 3 = 9 miles. The total miles run by Scott for a week from Thursday to Friday is 6 x 2 = 12 miles. So, in a week, Scott runs a total of 9 + 12 = 21 miles. Thus, he runs a total of 21 x 4 = 84 miles in a month. The answer is 84.