f you were running a race, and you passed the person in 2nd place, what place would you be in now?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

A swan sits at the center of a perfectly circular lake. At an edge of the lake stands a ravenous monster waiting to devour the swan. The monster can not enter the water, but it will run around the circumference of the lake to try to catch the swan as soon as it reaches the shore. The monster moves at 4 times the speed of the swan, and it will always move in the direction along the shore that brings it closer to the swan the quickest. Both the swan and the the monster can change directions in an instant.
The swan knows that if it can reach the lake's shore without the monster right on top of it, it can instantly escape into the surrounding forest.

How can the swan successfully escape?

Why Wine Glass Stem is so long?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

You need to arrange three 7 and mathematical symbols to form number 1?

Which number should replace the question mark?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

I don't get anymore wetter, no matter how much rain falls on me.

Can you make a fire with just a single stick?