Was explaining hexadecimal numbers to a friend and this made me wonder:
"Is there an hexadecimal number x that is a whole number n times its decimal value ?"
So for example the hexadecimal number 100 . $100_{16 }=256_{10}$ is thus 2.56 times its decimal value. (not a whole number)
But now which hexadecimal number is exactly 3 , 4 or another whole number times its decimal value?
PS: no guarantee given these numbers really exist, and have no idea what n means when it is greater than 9 (but you may think of it as hexadecimal or as decimal as you like)
Enjoy puzzling :)