Move four matchsticks to the below square to form three squares?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

You want to boil a two-minute egg. If you only have a three-minute timer (hourglass), a four-minute timer and a five-minute timer, how can you boil the egg for only two minutes?

Can you count the number of quadrilaterals in the picture below?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

A man is approaching a broad and barren land. He has a package with him. If somehow, he is unable to open the package before reaching the land, he will die.

Can you guess what is present in the package?

Why is the Hole below a Lock?

Look at the picture and find out which square is not linked with any of the other squares.

What part of the chicken has the most feathers?