Critical Thinking Puzzles

How many times are the hands of a clock at right angle in a day?

You have three jars that hold max 19, 13 and 7 liters of water respectively. 13 and 7 litre jars are full of water and 19 litre jar is empty...

There is a safe with a 5 digit number as the key. The 4th digit is 4 greater than the second digit, while the 3rd digit is 3 less than the 2...

Imagine a 3x3x3 wooden cube. How many cuts do we need to break it into 27 1x1x1 cubes?

Two boys want to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat ca...

5 pirates of different ages have a treasure of 100 gold coins. On their ship, they decide to split the coins using this scheme: The oldest p...

Anil has to receive a mail from Station, but the train arrives early and the mail is then sent by a cart to him. Both Anil and cart met in t...