I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

When it's bad luck to meet a black cat?

Replace all '*' with digits 1, 2, 3, 4, 5 and 6 to make below statement true.

* *
x *
=====
* * *

You can hear me, but you can't touch or see me.

What am I?

Can you place six X (crosses) in below board without making three in a row in any way ?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

What begins with T, ends with T, and has T in it?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

Replace the question mark with the correct number.