I travel all around the world but always stay in the corner. What am I?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

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?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

Okay before we begin with the puzzle, do keep in mind that you have to answer it quickly.

You are participating in a car race. Seeking the perfect moment, you overtake the second person in the race. What positions are you in now?

What begins with T, ends with T, and has T in it?

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

Why 1729 is a magic number? Answer Logically.