Reasoning and answer: 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: 64
What was the question?
Question: 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?

Reasoning and answer: John dances 3 + 5 = 8 hours. John's total time is 3 + 5 + 1 = 9 hours. James dances 9 / 3 = 3 hours longer than that. So James dances 9 + 3 = 12 hours. So the total dancing time is 8 + 12 = 20 hours.
The answer: 20
What was the question?
Question: John and James decided to have a dance-off. John danced for 3 hours and then another 5 hours after taking a 1-hour break. James danced the whole time John was dancing and resting, and then another 1/3 times more hours. How long was their combined dancing time without including John's break time?

Reasoning and answer: Lavinia’s daughter is 12 - 10 = 2 years old. Lavinia’s son is 12 * 2 = 24 years old. Lavinia’s son is 24 - 2 = 22 years older than Lavinia’s daughter.
The answer: 22
What was the question?
Question:
Lavinia’s daughter is 10 years younger than Katie’s daughter. Lavinia’s son is 2 times the age of Katie’s daughter. If Katie’s daughter is 12 years old, how many years older is Lavinia’s son than Lavinia’s daughter?