In all honesty, it actually took me about an hour. But its not that hard to solve if you know how to work the puzzle. I did puzzle books when I was a kid and there was a particular puzzle that I used to love that was set out in a specific table with statements for you to work out. So I drew up my own table and added in the info with ticks and crosses. Hard to explain, but if I could show you this table, then you would know what I mean when I say you can work it out quick, so I promise I'm being honest and I'm not that clever either! :)