Which word does the below Plexor means ?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

The day before yesterday I was 25 and the next year I will be 28. This is true only one day in a year. What day is my birthday?

The answer I give is yes, but what I mean is no. What was the question?

Can you decipher these quotes by Albert Einstein?
Blf xzm mvevi hloev z kilyovn lm gsv ovevo lm dsrxs rg dzh xivzgvw.

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

Can anyone tell me a word in the English dictionary which has a silent 'z'?