So the winner of the last puzzle as seen in the comments was Laura Mocanita. Congrats again!
But meanwhile I got a funny response that I wanted to share. It a hacking a la Alexander the Great and Gordian Knot kind of solution.
Here it is:
Result : The Input value 3, has Disappeared and has been replaced by 6 (Image) itself. So Now, 6 = 6. Hence, Input = Output.
Input Entered : ”><img src=x onerror=prompt(‘XSSED’);>
Result : Cross-Site Scripting
I am attaching Proof-Of-Concept for better Understanding. Hope, I win This Puzzle and Will be waiting for your mail asking me for my Paypal ID. Just Kidding