Question: 40 less than 10 times Diaz's age is 20 more than 10 times Sierra's age. If Sierra is currently 30 years old, how old will Diaz be 20 years from now?
Answer: If Sierra is currently 30 years old, 10 times her age is 30 * 10 = 300. Twenty more than 10 times Sierra's age is 300 + 20 = 320. 320 is 40 less than ten times Diaz's age so 10 times Diaz's age is 320 + 40 = 360. If ten times Diaz's age is 360, Diaz is 360 / 10 = 36 years old. Twenty years from now, Diaz will be 20 + 36 = 56 years old. The answer is 56.
[Question]Eddy’s spider plant produces 2 baby plants 2 times a year. After 4 years, how many baby plants will the mother plant have produced?
[Answer]The mother plant produces 2 baby plants 2 times a year so it produces 2 * 2 = 4 plants a year. It produces 4 plants a year so after 4 years it will produce 4 * 4 = 16 baby plants. The answer is 16.
Q: They say the first year of a dog's life equals 15 human years. The second year of a dog's life equals 9 human years and after that, every year of a dog's life equals 5 human years. According to this logic, how many human years has my 10-year-old dog lived?
A: If your dog is 10 years old then in his first year of life he lived 1 * 15 = 15 human years. In his second year of life, he lived 1 * 9 = 9 human years. We need to calculate his remaining years or 10 - 2 = 8 years of dog life into human years. If 1 year of dog life after the 2 years equates to 5 human years, then 8 years of dog life equals 8 * 5 = 40 human years. In total, your dog has lived 15 + 9 + 40 = 64 human years. The answer is 64.
Question: Darwin has 600$. He spent 1/3 of it on gas for his car, and 1/4 of what was left on food. How much money did he have left?
Answer: 600 / 3 = 200$ for gas. After buying gas, Darwin has 600 - 200 = 400$ left. 400 / 4 = 100$ on food. Darwin has 400 - 100 = 300$ left. The answer is 300.
[Question]Trevor's older brother was twice his age 20 years ago. How old was Trevor a decade ago if his brother is now 32 years old?
[Answer]If Trevor's brother is 32 years old today then 20 years ago he was = 32 - 20 = 12 years old. If Trevor's brother was 12 years old and he was twice Trevor's age, then Trevor was 12 / 2 = 6 years old. If Trevor was 6 years old 20 years ago, then he must be 6 + 20 = 26 years old today. If Trevor is 26 years old today then a decade ago he must have been 26 - 10 = 16 years old. The answer is 16.
[Question]James buys 3 shirts for $60. There is a 40% off sale. How much did he pay per shirt after the discount?
[Answer]
He got a 60 * .4 = $24 discount. So he paid 60 - 24 = $36 for the shirts. That means he paid 36 / 3 = $12 per shirt. The answer is 12.