John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

If six children and two dogs were under an umbrella, how come none of them got wet?

I inserted a coin in a bottle and closed its mouth with the help of a cork. Now, I was able to take the coin out from the bottle without taking out the cork or breaking the bottle. Can you tell me how I did it?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What can you serve, but never eat?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

What is the longest word in the dictionary?

Rectify the following equality 101 - 102 = 1 by moving just one digit.

The more of this there is, the less you see. What is it?