What runs around the whole yard without moving?

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

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

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

It has five wheels, though often think four, You cannot use it without that one more, You can put things in it, you can strap things on top, You can't find it in the market, but you can still go shop. What is it?

Can you find a seven digit number which describes itself. The first digit is the number of zeros in the number. The second digit is the number of ones in the number, etc. For example, in the number 21200, there are 2 zeros, 1 one, 2 twos, 0 threes and 0 fours.

What is harder to catch the faster you run?

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

Which fur should we be getting from the Lion?

Why Aeroplane windows are round?