How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

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

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

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Using eight eights and addition only, can you make 1000?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

Fate has decided that you will only be pleased to meet me when you need me

Maybe that is why, when I am working, I start working

However annoying I may be to the regulars, the little ones are always inspired

I will always be waiting if you try to reach me

How many of you can guess my name, let me see

Which city is three-fifths chick two third cat and 50% goat?

An exterior architect is asked by a builder to plant seven trees in a manner that there are exactly six rows of trees in a straight line and each row has three trees in particular.

How will he do it?