Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

What does below Rebus say?

XLR8

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

In the Chess Board picture below white army is arranged. You need to add a black army on the board such that no piece is under any threat.
Note: Army comprised of 1 king, 1 queen, 2 rooks, 2 bishops, 2 knights, and 8 pawns.

What Adam and Eve do not have but the rest of the people have?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

What does this Rebus Picture means ?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?