Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

A mules travels the same distance daily.
I noticed that two of his legs travels 10km and the remaining two travels 12km.
Obviously two mules legs cannot be a 2km ahead of the other 2.

The mules is perfectly normal. So how come this be true ?

What does a man do only once in his lifetime, but women do once a year after they are 29?

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?

2 ladies and 2 girls need to cross a river in a boat big enough for 1 LADY or 2 girls. How do they do it?

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

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

What does this say?

XLR8

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?