### Instruction: Jenny is older than Charlie by five years, while Charlie is older than Bobby by three years. How old will Charlie be when Jenny becomes twice as old as Bobby?### Response: Jenny is older than Charlie by 5 years who is older than Bobby by 3 years, thus Jenny is older than Bobby by 5+3 = 8 years.
Jenny will be twice as old as Bobby when he is 8*2 = 16 years old.
Jenny is 5 years older than Charlie so when Jenny is 16, Charlie will be 16-5 = 11 years old.
The answer is 11