If a wheel has 54 spokes, how many spaces are there between the spokes?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

What does below Rebus say?

XLR8

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Below, you can see three complete equations and one incomplete. Based on the three complete ones, can you complete the incomplete one?

5 $ 4 $ 3 $ 9 = 4215
6 $ 9 $ 2 $ 6 = 3816
4 $ 7 $ 3 $ 3 = 1122
7 $ 2 $ 7 $ 4 = ____

The peacock is a bird that does not lay eggs. How do they get baby peacocks?