What is the next number in this series?

4,12,84,3612....

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

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

Which is Odd One Out and why?

4377

3954

9862

8454

9831

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

You need to remove two matchsticks to make the below equation true. Can you do it ?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

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?