How can one talk without saying a single word?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Three playing cards in a row. Can you name them with these clues? There is a two to the right of a king. A diamond will be found to the left of a spade. An ace is to the left of a heart. A heart is to the left of a spade. Now, identify all three cards.

Can you quickly find which two matchstick figures are identical?

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

Solve the mathematical equation in the picture below.

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

What does below pictogram mean?

The more of this there is, the less you see. What is it?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.