What seven-letter word has hundreds of letters in it?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

There is one four-digit whole number n, such that the last four digits of n2 are the original number n

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

How is a fly different from a mosquito?

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

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

Below, you can see some coding:
January = 1017
February = 628
March = 1335
April = 145
May = 1353
June = 1064
July = 1074
August = 186

Now deciphering the way it has been coded, can you find out how September will be coded?