[Question]Erika and her brother Rick want to buy a gift for their mother that costs $250. They have both saved money. Erika saved $155 and her brother saved only half of the cost of the gift. They also want to surprise their mother with a birthday cake that costs $25. How much money will they have left after buying their mother a gift and cake?
[Answer]Rick's savings are half the price of the gift, which is $250 / 2 = $125. The total savings for the two siblings is $155 + $125 = $280. Mom's gift costs $250 + $25 for the cake = $275. Subtracting the total cost of the gift from the total savings, we get $280 - $275 = $5 left. The answer is 5.
Q: The Martin family goes to the mall to get ice cream. A kiddie scoop is $3. A regular scoop is $4. A double scoop is $6.  Mr. and Mrs. Martin each get the regular scoop. Their two children each get the kiddie scoop. Their three teenage children each get double scoops. How much money does Mrs. Martin pay the cashier?
A: The two regular scoops cost $4 x 2 = $8. The two kiddie scoops cost $3 x 2 = $6. The three double scoops cost $6 x 3 = $18. For all the ice creams they ordered, Mrs. Martin pays $8 + $6 + $18 = $32. The answer is 32.
Question: There are 40 students in the 6th grade. 25% of them wear glasses and 40% of them wear contact lenses. How many students do not wear any vision assistance wear?
Answer: There are 40 x 25% = 10 students who wear glasses. There are 40 x 40% = 16 students who wear contact lenses. There are 10 + 16 = 26 students who wear vision assistance. There are 40 - 26 = 14 students who do not wear any vision assistance wear. The answer is 14.
[Question]A single train car can carry 60 passengers. A 747 airplane can carry 366 passengers. How many more passengers can a train with 16 cars carry than 2 airplanes?
[Answer]A train with sixteen cars can carry 16 x 60 = 960 passengers. 2 airplanes can carry 2 x 366 = 732 passengers. The train can carry 960 - 732 = 228 passengers more than 2 airplanes. The answer is 228.
Q: Every ten minutes during sunset, the sky changes to a new color. How many colors did the sky turn over the two hours of a long summer sunset if each hour is sixty minutes long?
A: At 60 minutes per hour, the sunset was 2 * 60 = 120 minutes long. The sky changes color every 10 minutes, so it turned 120 / 10 = 12 colors over the summer sunset. The answer is 12.
Question: Jon makes 3/4's the salary that Karen makes. John makes $3000 per month. How long will it take him to make the same amount of money that Karen does in 3 months?
Answer:
Karen makes $3000 / (3 / 4) = $4000 per month. In three months, Karen would make a total of $4000 * 3 = $12000. To make the same amount of money John would need to work $12000 / $3000 = 4 months. The answer is 4.