Q: John buys 1.5 ounces of silver and twice as much gold. The silver costs $20 per ounce. The gold is 50 times more expensive per ounce. How much does he spend on everything?
A: 3030
Step-by-step reasoning process: He buys the silver for 1.5 * $20 = $30. He bought 1.5 * 2 = 3 ounces of gold. The gold is worth %20 * 50 = $1000 per ounce. So he buys 3 * $1000 = $3000 on gold. So he spent $30 + $3000 = $3030 on everything.

Q: John uses the bathroom every 50 minutes. How many times does he use the bathroom during a 2.5-hour movie?
A: 3
Step-by-step reasoning process: The movie last 2.5 * 60 = 150 minutes. So he uses the bathroom 150 / 50 = 3 times.

Q: When Jayson is 10 his dad is four times his age and his mom is 2 years younger than his dad. How old was Jayson's mom when he was born?
A: 28
Step-by-step reasoning process: When Jayson is 10 his dad is 10 x 4 = 40 years old. His mom is 40 - 2 = 38 years old. When Jayson is born, his mom is 38 - 10 = 28 years old.

Q: George bought some food for his trip: a bottle of juice, a sandwich, and a bottle of milk. The sandwich was for $4, and the juice was two times more expensive. The bottle of milk cost was 75% of the total cost of the sandwich and juice. How much did George pay for his food?
A: 21
Step-by-step reasoning process: The juice was two times more expensive than the sandwich, so it was 4 * 2 = $8. The juice and the sandwich in total were a cost of 4 + 8 = $12. So the cost of one bottle of milk was 75 / 100 * 12 = $9. In total for all the food, George paid 12 + 9 = $21.