How many sides does a circle have?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

How many words can a pen with half refill write?

In the given picture, in how many ways can you read the word "Tiger"?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?

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 is the difference between a jeweller and a jailer?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Which letter of the alphabet has the most water?

When it is alive we sing, when it is dead we clap our hands. What is it?