7542

7542 is the code that is used very much in The Impossible Qatar series. Its first appearance was in Question 16 of The Impossible Qatar, and it has appeared in all the major games of the series. Most of these questions ask the player to recall the code, usually with the word "Remember?", similarly to the blue-red-blue-yellow code from The Impossible Quiz.
== Appearances ==
Despite how frequently you're asked for this code, it is only given to you three times in the entire series:
* Question 16 of The Impossible Qatar: Its first appearance. You're told to "Remember: 7, 5, 4, 2." 
* Question 49 of The Impossible Qatar 3: Drag away the middle of the screen. The object you need to click is shaped like the numbers 7542. (Since you don't need to remember the code to answer this one, it counts as a reminder of the code).
* Question 20 of the The Impossible Qatar '22: After touching the red dot, the numbers 7542 will appear just outside the maze.
Inputting in some form is required for the following questions:
=== The Impossible Qatar ===
* Question 18: You must click the question number to split it up into 7+5+4+2, which add to 18.
* Question 44: Click the answer box that says 7542.
* Question 88: Type "7542" on the keyboard. None of the digits onscreen are correct.
=== The Impossible Qatar 2 ===
* Question 17: Type "7542" on the keyboard. Again, none of the digits onscreen are correct.
* Question 75: Click the word "answers" in the question to turn it into 42 (a Hitchhiker's Guide to the Galaxy reference). Then, drag the 42 to the right edge of the question number, creating 7542.
=== The Impossible Qatar 3 ===
* Question 99: Input 7542 into the number pad onscreen.
=== The Impossible Qatar Meta ===
* Question 24: Click the bomb when it reaches 7 seconds, when it reaches 5 seconds, then 4 seconds, and finally 2 seconds. This will cause the code to appear onscreen as well as the message "YOU'RE A CLEVER ONE." The number on the bomb is green when you need to click it.
=== The Impossible Qatar '22 ===
* Question 122: Input 7542 into the number pad onscreen.
=== The Impossible Qatar 99’ ===
* Question 9: Type 7542 on the keyboard.
== Trivia ==
* The numbers of the code happen to all be in descending order, which makes the use of the bomb in Question 24 of The Impossible Qatar Meta possible.
* The sequence "7542" was not chosen for any particular reason.
* Question 12 of The Impossible Qatar asks you "Remember?", however, since you aren't told the code until later, you have nothing to remember, so the correct answer is "No".
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