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.

Can you make four (4) nines (9) equal 100?

In the picture that is attached with this question, you can find a square which comprises of four little squares inside it. Consider this square to be made with matchsticks. You have to remove two matchsticks such that only two squares remain instead of five.How will you do it ?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What is the next number in the series?

15 29 56 108 208 ?

What brings you down but never up?

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?