What is the next number in this series?

4,12,84,3612....

How can you take 2 from 5 and leave 4?

Why is the Hole below a Lock?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

During an interview, the interviewer ordered hot coffee for the candidate to relieve the stress. The coffee was kept before him. After a minute, the interviewer asked him, 'What is before you?' He replied 'Tea'.

The candidate was selected immediately. Why?

What number divided by 4 is the same as that number minus 4?

Count the Triangle in the figure given below:

Can you divide the below-given shape into four equal and identical pieces?

Queen Elizabeth organised a royal party.

To Avoid uninvited guest royal family set a password.
Jack (an uninvited person) plan to enter the party. He stand nearby the door.

First guest comes, the security person said 'twelve' and guest replied with six.
Second guest comes , the security person said 'six' and guest replied with 'three'.

Jack thought is enough and he walked to the entry point. The security person said 'eight' , Jack replied smilingly 'four'.
He was immediately thrown out of the party. why ?

Replace the question mark in the picture below.