Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

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?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

During which month do people sleep the least?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

Find the missing number in the series below

13 -21 34 -55 ? -144

Manish and Manoj play 5 games of chess.
Both Manish and Manoj win the exact same number of games. There is no tie at all.

How?

What happened when the wheel was invented?

A man always keeps a spare tyre in his car. To make full use of all the five tyres, he changes the tyres in a manner that for a distance of 1, 00,000 km, each of them runs the same distance.

Can you calculate the distance travelled by each tyre on that journey?