How many sides does a circle have?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

How many times can you subtract the number two from the number fifty?

How many times can you subtract the number 5 from 25?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

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

How many letters are in the alphabet?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?