Jaymee is 2 years older than twice the age of Shara. If Shara is 10 years old, how old is Jaymee?
Let's think: Twice the age of Shara is 10 x 2 = 20. So, Jaymee is 20 + 2 = 22 years old.. The answer is: 22.

Alex needs to be 54 inches tall to ride the newest roller coaster at the theme park. He is 48 inches tall this year. He hears a rumor that for every hour he hangs upside down, he can grow 1/12 of an inch. Normally he grows 1/3 of an inch per month. On average, how many hours does he need to hang upside down each month to be tall enough next year to ride the rollercoaster?
Let's think: He is 6 inches too short this year because 54 - 48 = 6. He will naturally grow 4 inches taller because 12 x (1 / 3) = 4. He needs to grow 2 inches from hanging because 6 - 4 = 2. He needs to hang for 24 hours because 2 / (1 / 12) = 24. He needs to hang for 2 hours a month because 24 / 12 = 2.. The answer is: 2.

The capacity of Karson's home library is 400 books. If he currently has 120 books, how many more books does he have to buy to make his library 90% full?
Let's think: When 90% full, Karson's library holds 90 / 100 * 400 = 360 books. If he has 120 books in the library now, he needs to buy 360 - 120 = 240 books to make his library 90% full.. The answer is: 240.

On the night of the dance, 400 students show up to the party. 70% of the students who showed up were invited. If 40% of those invited to the party had their invitation revoked and were not allowed into the party, how many invited students attended the party?
Let's think:
On the night of the dance 70 / 100 * 400 = 280 students who showed up to the party were invited. If 40% of those invited to the party had their invitation revoked, there were 40 / 100 * 280 = 112 students who showed up and had their invitation revoked. The number of invited students who attended the party is 280 - 112 = 168.. The answer is: 168.