Amanda’s garden contains 20 flowers and Peter’s garden contains three times as many flowers as Amanda's. If Peter gave 15 flowers to his brother, how many flowers are left in his garden? Give the rationale and then the answer.
Let's think step by step. The number of flowers in Peter’s garden is 20 * 3 = 60 flowers. The number of flowers left after he gave his brother 15 flowers is 60 – 15 = 45 flowers.. The answer is: 45.

Edward had $17.80 to spend at the toy store. He bought 4 toy cars that cost $0.95 each and a race track that cost $6.00. How much money does Edward have left to buy more toys? Give the rationale and then the answer.
Let's think step by step. The cost of the toy cars is 4 × $0.95 = $3.80. The total cost of the toys is $3.80 + $6.00 = $9.80. Edward has $17.80 − $9.80 = $8.00 left.. The answer is: 8.

Matt can paint a house in 12 hours. Patty can paint the same house in one third the time. Rachel can paint the same house in 5 more than double the amount of hours as Patty. How long will it take Rachel to paint the house? Give the rationale and then the answer.
Let's think step by step. Patty: 12 / 3 = 4 hours. Rachel: 5 + 2(4) = 13 hours.. The answer is: 13.