Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

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

Can you find out the missing number in the grid?

Our product and our sum always give the same answer. Who are we?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

What does it mean?

Solve the following series:
AZ, GT, MN, __, YB

John is selling fruits.
He sells grapes at $30, Dates $25, and a Wolfberry $45.
At what price does he sell fig?

PS: Logical Thinking

As we know that white starts the game of chess. Can you find the scenario shown in the picture below is possible when all the white pieces are at the original place while the black pawn is not as in the below picture?