Q: Mary earns $20 washing cars and $40 walking dogs each month. If she puts half of that money away each month how long would it take her to save $150?
A: Each month she makes 20 + 40 = $60. Every month she saves 60 / 2 = $30. To save $150 it will take her 150 / 30 = 5 months. The answer is 5.

Q: Nathan planted 5 strawberry plants and 7 tomato plants. He harvested 14 strawberries from each plant and 16 tomatoes from each plant. He then distributed the strawberries and tomatoes into baskets of 7. He sold a basket of strawberries for $9 and a basket of tomatoes for $6. How much money does Nathan make from his harvest?
A: Nathan harvested a total of 5 x 14 = 70 strawberries. He harvested a total of 7 x 16 = 112 tomatoes. He was able to fill 70 / 7 = 10 baskets with strawberries. He was able to fill 112 / 7 = 16 baskets with tomatoes. He made 10 x $9 = $90 from the strawberries. He made 16 x $ 6 = $96 from the tomatoes. All together, he made $90 + $96 = $186 from his harvest. The answer is 186.

Q: Aaron, Henry's brother, is 15 years old. Henry's sister is three times as old as Aaron. Henry is four times as old as his sister. What's the combined age of the siblings?
A:
If Aaron is 15 years old, and his sister is 3 times as old as him, then the sister is 3 * 15 = 45 years old. Together, Aaron and his sister have a total age of 45 + 15 = 60 years. Henry is four times as old as the sister, meaning he is 45 * 4 = 180 years old. The three siblings together have a total age of 60 + 180 = 240 years. The answer is 240.