In 13 mins - http://jsfiddle.net/jtR9E/ Found this task pretty interesting, of course i used random, cause that's a normal think i guess. This test tells the company, the following things about you: 1) How do you do in a stressed situation; 2) What is the code quality you write; 3) What you're trying to do first, functionality or beauty.

In the beginning a had no idea what should I do, so I found it quite complicated, but then after a bit of thinking this was quite easy .

Well yes in order to make it more animated I think this should have a different approach.

After 15 minutes - http://jsfiddle.net/NSdyg/ Another 5 to make it work (almost) - http://jsfiddle.net/NSdyg/1/

I don't do much JS (as you can likely tell) but found the task approachable. I think that the low barrier to entry is a good thing for an interview question.

My approach is described in the comments. I started by writing it out and then went from there.

s/shellgame/cardflipgame

So. I took the exercise in a different direction. I thought of game of shells and my mind got stuck on the card flip matching game, so that's what I went with. I spent most of my time worrying about how much time had gone by, which wasn't helpful, but I think it came together.

I think the idea of this is great, and I may use a deviation of it for future pre-hire peer reviews.

dunno how to post anonymously because the jsfiddle url contains my user name :(

http://jsfiddle.net/wanhalo/G5ShW/1/

done it in 20mins but quite messed up (working) code http://jsfiddle.net/aamir/H7mmd/2/

done it in more than 15min :( http://fiddle.jshell.net/v6u6A/4/