Q: 40% of a farmer's cattle are males. The rest are females. If a female cow produces 2 gallons of milk a day, how much milk will the farmer get a day if he has 50 male cows?
A: The farmer has 125 cows because 50 / .4 = 125. The farmer has 75 female cows because 125 x .6 = 75. The farmer will get 150 gallons of milk a day because 75 x 2 = 150. The answer is 150.

Q: Hugh had eight pounds of candy, Tommy had six pounds of candy, and Melany had seven pounds of candy. If they share the candy equally, how much will each person have?
A: Hugh and Tommy have a total of 8 + 6 = 14 candies. Since Melany also has seven candies, they have 14 + 7 = 21 candies. If they combine and share the candies equally, each person will get 21 / 3 = 7 candies. The answer is 7.

Q: Missy had a giant piggy bank in her bedroom. Every day she would search the house for change to put in her bank. After 4 years, the bank was opened and it contained $450 in change. If the second, third, and fourth-year she doubled the amount of money she put in the bank from the amount she had put in the previous year, how much money, in dollars, did she put in the bank the first year?
A:
We let x be the amount of money she put in the bank the first year,. Then the second year was 2 * x,. and the third year was 2 * 2 * x = 4 * x,. and the fourth year was 2 * 2 * 2 * x = 8 * x. And the total amount she put in the bank, $450, is the sum of all four years, or $450 = x + (2 * x) + (4 * x) + (8 * x). This simplifies to $450 = 15 * x. And therefore, the amount of money she put in the bank the first year was x = $30. The answer is 30.