What is full of holes but still holds water?

At a bar, three friends, Mr Green, Mr Red and Mr Blue, were having a drink. One man was wearing a red suit; one a green suit; and the other a blue suit. 'Have you noticed,' said the man in the blue suit, 'that although our suits have colours corresponding to our names, not one of us is wearing a suit that matches our own names?' Mr Red looked at the other two and said, 'You're absolutely correct. What colour suit is each man wearing?

Find the next number in the series.
1 10 24 43 67 ?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

10 people came into a hotel with 9 rooms and each guest wanted his own room. The bellboy solved this problem.
He asked the tenth guest to wait for a little with the first guest in room number 1. So in the first room, there were two people. The bellboy took the third guest to room number 2, the fourth to number 3, ..., and the ninth guest to room number 8. Then he returned to room number 1 and took the tenth guest to room number 9, still vacant.
How can everybody have his own room?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

What is the next number in this series?

4,12,84,3612....

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Can you replace the question mark with the correct number?