What month of the year has 28 days?

There is something which you can be arrested for attempting but not for successfully completing.

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

A girl has as many brothers as sisters, but each brother has only half as many brothers as sisters. How many brothers and sisters are there in the family?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

I’m tall when I’m young, and I’m short when I’m old. What am I?

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?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.