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

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

Complete the given grid with valid words. You can only use the letters AAEEIIMMPPTT.

Hint: The grid reads the same across as down.

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

What number when divided in half becomes zero?

I have no life, but I can die. What am I?

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?