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.

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

Why do you find that most of the buildings are deprived of the 13th floor?

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

How do you go from 98 to 720 using just one letter?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

Replace the question mark with the number below given a simple math problem.

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?