I have feet, but no legs. Which animal Am I?

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.

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

Solve the puzzle by telling what does below picture means.

In the below-given picture of a pretty girl, there is something wrong. Can you find out what it is?

Your last good ping-pong ball fell into a narrow metal pipe embedded one foot deep in concrete.
How can you get it out undamaged, if all the tools you have are your tennis paddle, shoe laces, and plastic water bottle, which does not fit into the pipe?

You can see it everyday, But cannot touch it at will. What is it?

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _

Which flower has two lips?