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

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

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?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Find the last number in the series below:

voN luJ yaM raM ---

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

There is an ancient kingdom where every married woman keeps information regarding the fidelity of other men. However, what they don't know is the fidelity of their own husbands. Also, there is an ancient belief that they don't tell each other about the fidelity of their husbands.

On a certain day, the queen of the kingdom declares that she has identified at least one unfaithful man in the kingdom. She allows the wives to identify and gives them authority to kill their husbands if they are unfaithful at midnight.

How will the wives manage it?