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

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

A Shopkeeper collects 71 rupees in the form of 20 paisa and 25 paisa.
He collects a total of 324 coins.

Can you tell me how many number of 20-paisa and 25-paisa he got?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

What does the below rebus riddle means?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

why number 8549176320 is one of a kind?

How can a man go eight days without sleep?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Can you find a rabbit in the given picture?

What does does this rebus picture means ?