By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

I make two people out of one. What am I?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

What is so fragile that saying its name breaks it?

There was a strange boy who was born before his father. How can this be possible?

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

On rolling two dices (six-sided normal dice) together, what is the probability that the first one comes up with a 2 and the second one comes up with a 5?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

When does a USA Potato change its nationality?

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?