How Tall

Riddle: A boy that was 5 put a knife into a tree trunk to show how tall he was. One day his parent took him on a trip to a nearby town. When he came back to his tree he was an age up. So, how tall would the knife be?

Answer: The knife was at the same place because trees grow on the top, not the bottom.

Source: https://www.riddles.com/9046

A boy that was 5 put a knife into a tree trunk to show how tall he was. One day his parent took him on a trip to a nearby town. When he came back to his tree he was an age up. So, how tall would the knife be? — How tall by Nam le v1.

Riddle: A boy that was 5 put a knife into a tree trunk to show how tall he was. One day his parent took him on a trip to a nearby town. When he came back to his tree he was an age up. So, how tall would the knife be? Answer: The knife was at the same place because trees grow on the top, not the bottom. — by Nam le v2.