Reasoning and answer: The 33 children ate a total of 33 * 10 = 330 apples. There were 450 - 330 = 120 apples left for the adults to eat. If every adult ate 3 of the 120 apples left, then there were 120 / 3 = 40 adults in the family.
The answer: 40
What was the question?
Question: Bob picked 450 apples for his entire family to eat. There are 33 children in his family, and each of them ate 10 apples. If every adult ate 3 apples apiece, how many adults are in his family?

Reasoning and answer: At 5 cents a minute, calling his father cost Freddy 5 * 45 = 225 cents. At 25 cents a minute, calling his brother cost Freddy 25 * 31 = 775 cents. Adding the cost of calling his father and brother, we find that Freddy paid a total of 225 + 775 = 1000 cents. Since each dollar has 100 cents, Freddy paid 1000 / 100 = 10 dollars.
The answer: 10
What was the question?
Question: Freddy is calling his family on New Year's Eve. He calls his dad, who lives in the same city as him, and they talk for 45 minutes. Then he calls his brother, who lives on the other side of the world, and they talk for 31 minutes. Local calls cost 5 cents a minute, while international calls cost 25 cents a minute. How many dollars did Freddy spend calling his family on New Year's Eve?

Reasoning and answer: His income tax is 10% of 500 which is 500 * 10% = $50. His tithe costs 10% of $500 which is 500 * 10% = $50. The total expenses are 50 + 55 + 50 = $155. He is then left with $500 - $ 155 = $345.
The answer: 345
What was the question?
Question:
Alex gets paid $500 a week and 10% of his weekly income is deducted as tax. He also pays his weekly water bill for $55 and gives away another 10% of his weekly income as a tithe. How much money does Alex have left?