At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?

How many letters are in the alphabet?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

In the four images below, can you find the odd one out?

How many words can a pen with half refill write?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

What number when divided in half becomes zero?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

The centre of the third figure is empty. What digit should fit inside?