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

You are given four tennis balls and asked to arrange those balls in a manner that the distance between each one of them is exactly equal. How will you do it?

I travel all around the world but always stay in the corner. What am I?

Which is faster, Heat or Cold ? Explain.

What 5-letter word typed in all capital letters can be read the same upside down?

With the help clues provided in the image, can you find the 5 digit key?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

Find the value of "?" in the ball picture Riddle below:

What kind of band never plays music?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?