Question: Tracy set up a booth at an art fair. 20 people came to look at her art. Four of those customers bought two paintings each. The next 12 of those customers bought one painting each. The last 4 customers bought four paintings each. How many paintings did Tracy sell at the art fair?
Answer: The first 4 customers bought 4 * 2 = 8 paintings. The next 12 customers bought 12 * 1 = 12 paintings. The last 4 customers bought 4 * 4 = 16 paintings. In total Tracy sold 8 + 12 + 16 = 36 paintings. The answer is 36.

Question: Mary sees three breeding balls with 8 snakes each and 6 additional pairs of snakes. How many snakes did she see total?
Answer: First find how many snakes were in all the breeding balls: 3 balls * 8 snakes / ball = 24 snakes. Then find how many snakes are in all the pairs: 2 snakes / pair * 6 pairs = 12 snakes. Then add the number of snakes in both types of groups to find the total number of snakes: 24 snakes + 12 snakes = 36 snakes. The answer is 36.

Question: Sally took 342 pens to her class of 44 students. If she gave 7 pens to each student, left half of the remainder in her locker, and took the rest home, how many did she take home?
Answer: She gave 7 pens each to 44 students for a total of 7 * 44 = 308 pens. There are now 342 - 308 = 34 pens left. She left half of 34 pens in her locker which is 34 * (1 / 2) = 17 pens. She took 34 - 17 = 17 pens home. The answer is 17.

Question: 55% of Toby's friends are boys and the rest are girls. If he has 33 friends who are boys, how many friends does he have who are girls?
Answer:
Toby has 60 friends because 33 / .55 = 60. 45% of his friends are girls because 100 - 55 = 45. He has 27 friends who are girls because 60 x .45 = 27. The answer is 27.