[Question]Patty decides that to convince her brother and sister to do her chores in exchange for cookies. Patty agrees to give them 3 cookies for every chore they do. Each kid normally has 4 chores to do per week. Patty has $15 to buy cookies. Each pack of cookies contains 24 cookies and costs $3. How many weeks can Patty go without doing chores by paying her siblings with cookies?
[Answer]Patty can buy 5 packs of cookies because 15 / 3 = 5. Patty gets 120 cookies because 5 x 24 = 120. Patty would need to pay 12 cookies per week because 3 x 4 = 12. Patty can avoid 10 weeks of chores because 120 / 12 = 10. The answer is 10.

[Question]Tyrah has six times as many pencils as Sarah has. Tim has eight times as many pencils as Sarah. If Tyrah has 12 pencils, how many does Tim have?
[Answer]Sarah has 12 / 6 = 2 pencils. Tim has 8 * 2 = 16 pencils. The answer is 16.

[Question]Karen is paddling her canoe up a river against the current. On a still pond, Karen can paddle 10 miles per hour. The river flows in the opposite direction at 4 miles per hour. If the river is 12 miles long, how many hours will it take Karen to paddle up it?
[Answer]First find Karen's net speed by subtracting the speed of the current: 10 mph - 4 mph = 6 mph. Then divide the length of the river by Karen's speed to find how long it takes her to paddle up it: 12 miles / 6 mph = 2 hours. The answer is 2.

[Question]A library has 7 rectangular tables and the remaining tables will be square tables. A rectangular table seats 10 pupils while a square table seats 4 pupils. How many square tables are needed so that 90 pupils can read at the same time?
[Answer]
The rectangular tables seat 7 * 10 = 70 pupils. The square tables will seat 90 - 70 = 20 pupils. The library needs 20 / 4 = 5 square tables. The answer is 5.