Can you find out which options fits best with the missing column?

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

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

John had a bag containing colourful marbles. The colours are red, green and blue. The total number of marbles he had in his bag was 60. There are 4 times as many red marbles as green marbles. 6 more blue marbles than green marbles. How many marbles of each colour did John have?

Detective Rockford was jogging near the beach at 4:30 am.
He hears a sound near the shack "No Michael, Please Do not shoot me".
Next instance he heard the sound of gunfire. Rockford rushes to the shack where he finds women lying dead and a gun in close proximity of three "Doctore Lawyer and a Teacher".

Rockford immediately knew that the Lawyer has committed the crime. How?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

What four weights can be used to balance from 1 to 30 pounds?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

I look at you, you look at me, I raise my right, you raise your left. What am I?