They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

what does the below math rebus puzzle mean?

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?

Identify the hidden meaning behind this picture?

Name a key which is hardest to turn.

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

Two in a corner, one in a room, zero in a house, but one in a shelter. What am I?

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

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes