What does this mathematical rebus means ?

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?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

Every words stands for unique digit that makes the arithmetic equation true

SEVEN + SEVEN + SIX = TWENTY.

What are the digits ?

Optical Illusion Eye Test: You Have A Brain Like Computers If You Can Spot Two B's Among R's In 8 Seconds!

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

Can you arrange the six given marbles in a manner that each one of them is touching all four marbles of different colours?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?