John plays paintball 3 times a month. Each time he plays he buys 3 boxes of paintballs. They cost $25 per box. How much does he spend a month on paintballs? Give the rationale and then the answer.
Let's think step by step. He spends 3 * 25 = $75 each time he plays. So he spends 75 * 3 = $225.. The answer is: 225.

Anna has 3 times as many toys as Mandy and 2 fewer toys than Amanda. If they have 142 toys all together, how many toys does Mandy have? Give the rationale and then the answer.
Let's think step by step. Let x be the number of toys Mandy has. Anna has 3 * x toys. Amanda has 3 * x + 2 toys. x + 3 * x + 3 * x + 2 = 142. 7 * x + 2 = 142. 7 * x = 140. x = 20.. The answer is: 20.

Ian had twenty roses. He gave six roses to his mother, nine roses to his grandmother, four roses to his sister, and he kept the rest. How many roses did Ian keep? Give the rationale and then the answer.
Let's think step by step. Ian gave a total of 6 + 9 + 4 = 19 roses. Therefore, Ian kept 20 - 19 = 1 rose.. The answer is: 1.