human
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?
assistant
How old is Jenny? ** Jenny is older than Charlie by 5 years who is older than Bobby by 3 years, so Jenny is older than Bobby by 5+3 = <<8=8>>8 years
How old will Jenny be when Bobby is 16? ** Jenny will be twice as old as Bobby when he is 8*2 = 16 years old
How old will Charlie be when Jenny is 16? ** Jenny is 5 years older than Charlie so when Jenny is 16, Charlie will be 16-5 = 11 years old
#### 11