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? Let's think first. Chain of thought:
User
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.
Therefore, the answer is 16.
Assistant