Do You See It?

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

Replace the question mark with the correct number in below Picture:

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?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

What is common among 11, 69, and 88?

What two things can you never eat for breakfast?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

On a magical land of Mexico , all the animal in the land are rational.

There are 10 tigers and one goat.
Tiger can eat goat but since it's a magical land , the tiger who eats the goat , turns into goat and then can be eaten by the remaining tiger(s).

If we leave them for some time then how many goat and tiger will be there , when we come back ?