I’m tall when I’m young, and I’m short when I’m old. What am I?

If eleven plus two equals one, what does nine plus five equal?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

In the picture below can you find the correct switch that will turn on the bulb?

There are four 3-link chains. All you have to do is join them into a big 12-link chain. For joining two closed links, one of the links must be cut and placed onto the other link for closing.

How many minimum links will you have to cut to make the big chain?

How many sides does a circle have?

These types of puzzles are known as charades. What you have to do is find two words that are referred to in the first stanza and the second stanza and put them together to form the third word in the third stanza.

Just for example, if my first refers to 'off' and my second refers to 'ice', then my whole will be office.

My first is present - future's past -
A time in which your lot is cast.

My second is my first of space
Defining people's present place.

My whole describes a lack of site -
A place without length, breadth, or height.

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

I know a nine-letter word having only one vowel.
Do you ?