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.

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

Look at the picture and find out which square is not linked with any of the other squares.

Count the number of triangles in the given picture.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

John speaks the truth only once a day in a week. Below are a few hints for you:

First: Days are Sunday, Monday and so on.
Second: One day he says, "I lie on Monday and Tuesday".
Third: On the next day, he says, "Today is either Thursday, Saturday or Sunday".
Fourth: On the next day, he says, "I lie on Wednesday and Friday".

Can you identify the day on which he speaks the truth?

Find the next number in the series below

21 32 54 87 131 ?

Can you count the number of children in the picture below

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?