It is always ahead of me yet I can never see it. What is it?

Count the number of triangles in the below picture?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

What kind of tree can you carry in your hand?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?

What does this rebus means ?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

Why is Saturday stronger than Monday?

What goes through cities and fields, but never moves?