Critical Thinking Puzzles

There are 100 doors in a row numbered from 1 to 100. Initially all are closed. Then you make 100 passes by the 100 doors. In pass 1 you togg...

What is unusual about this paragraph? You will find that this is not just an ordinary paragraph if you look at its words. An odd group of wo...

Golo is locked in a cave. He is having 2 vessels with him (5ltr & 7ltr). The gate of the cave will open only when there are exactly 6 li...

Comparison of the areas of the 2 shapes creates a paradox: 64 = 65 How is this possible?

Each of the letters in the equation below represents one of the digits from 0 to 9. Determine which digit corresponds to each letter. ...

A Race track is one mile long, if a driver goes around once at 30 miles per hour, how fast must he drive in the second lap to average sixty ...

A horse have to transfer bananas from one point to the other point (points are 1000km apart). He can take atmost 1000 bananas at a time and ...