I travel all around the world but always stay in the corner. What am I?

Place a mathematical symbol between the numerals 5 and 9 in such a way that the resulting number is greater than 5 but smaller than 9.

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?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

Wednesday, Steve and Pam go to a restaurant to eat lunch. After eating lunch, they pay the bill. But Steve and Pam do not pay the bill. So…who does?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

What is always in front of you but can’t be seen?

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?