A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

What's the only room from which no one can enter or leave

I don't get anymore wetter, no matter how much rain falls on me.

What do you call a fish without an eye?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

Can you find out the remainder when 3^300 is divided by 5?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

People put me on the table and cut me but do not eat me. What am I?