They are ASCII, using decimal code points, where 54 is '6'
, 56 is '8'
and so on. Decoding that gives you:
68 74 74 70 3a 2f 2f 69 6d 67 75 72 2e 63 6f 6d 2f 46 57 37 44 4d 4f 35
But that again looks like valid ASCII code points (in hex this time) so decoding them gives you:
http://imgur.com/FY9DMO5
which leads to this image:
Now, if you look really closely at the black bit under the white square, you'll see some dots reminiscent of braille. And, in fact, the letters spelled out seem to be:
bitdotdoslashwehunger
If you enter that into a browser as bit.do/wehunger
, you end up with yet another image:
As to what that is, my detective skills have reached the limit of my ability to care. Since the first image was called Day J
, and this last one is called Day K
, I suspect it's a puzzle of some sort and you should probably continue on your own.
In any case, if it's a job interview puzzle process and it's for the same big trendy company I'm currently interviewing for, I don't want to make it too easy for you :-)
I'll probably carry on following the trail just because I like puzzles, but I won't be publishing the results. Good luck in your hunt.