You find yourself in a strange place guarded by two guards.One of the guard always say truth while other always lies.You don't know the identity of the two.You can ask only one question to go out from there. What should you ask?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

Can you replace the X (both small and big x) with the numbers between 1 to 19 such that all the rows of 3 numbers between X (big x) sum to 23?

Buy me, smell me or deliver me, I do not change.

Who am I?

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

Forwards I am heavy, backward I am not. What am I?

The Little ant seems to be always confused. Do you know why?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

What does this mathematical rebus means ?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?