How can one talk without saying a single word?

Find out the missing number in the picture attached:

Can you find out the remainder when 3^300 is divided by 5?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

What is more useful when it is broken?

How many letters are in the alphabet?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

What is the coolest letter in the alphabet?

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 ?