Can you replace the question mark with the correct number?

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 sure no one can have two things for dinner. what are they?

Can you replace the question mark with the correct number in the below table sequence?

At my favorite fruit stand,
an orange costs 18,
a pineapple costs 27,
and a grape costs 15.
Using the same logic, can you tell how much a mango costs?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What occurs twice in a week, once in a year but never in a day?

How can you drop a raw egg from a height onto a concrete floor without cracking it?