[Question]Ms. Warren ran at 6 mph for 20 minutes. After the run, she walked at 2 mph for 30 minutes. How many miles did she run and walk in total?
[Answer]20 minutes is 20 / 60 = 1 / 3 of an hour. Ms. Warren ran 6 / 3 = 2 miles. 30 minutes is 30 / 60 = 1 / 2 of an hour. Ms. Warren walked 2 / 2 = 1 mile. Ms Warren ran and walked 2 + 1 = 3 miles in total. The answer is 3.

[Question]Annie walked 5 blocks from her house to the bus stop. She rode the bus 7 blocks to the coffee shop. Later, she came home the same way. How many blocks did Annie travel in all?
[Answer]Annie traveled 5 + 7 = 12 blocks to the coffee shop. Her round trip would take 12 x 2 = 24 blocks. The answer is 24.

[Question]Miss Aisha's legs are 1/3 of her total height. If her head is also 1/4 of her total height, and she is 60 inches tall, calculate the length of the rest of her body.
[Answer]Miss Aisha's legs are 1 / 3 * 60 = 20 inches. The length of her head is 1 / 4 * 60 = 15 inches. Together, her head and legs are 15 + 20 = 35 inches. If her total height is 60, the rest of her body has a length of 60 - 35 = 25 inches. The answer is 25.

[Question]Alex is stacking his books in a pyramid. Each level of the pyramid has 80% as many books as the number of books in the previous level. If he makes four levels and the top level has 64 books, how many books are in the pyramid in total?
[Answer]
The third level has 80 books because 64 / .8 = 80. The second level has 100 books because 80 / .8 = 100. The first level has 125 books because 100 / .8 = 125. In total there are 369 books because 64 + 80 + 100 + 125 = 369. The answer is 369.