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

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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

What breaks yet never falls, and what falls yet never breaks?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

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

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

What has to be broken before you can use it?