I took an interesting IQ test today that was, I thought, pretty hard. However, after much mental crunching I managed to get 15 of the 20 possible questions correct. After that, with the help of two guys I work with we managed to get 18 of them correct. The only 2 we didn't know where the #1 and #20.
I've never seen an IQ test quite like this one and I don't really know how valid it is but it was a fun puzzle to try and solve. See how many you can get right. Here are the numbers of those I solved without help, then those with help.
Without Help
2,3,4,5,6,7,8,9,10,12,13,14,15,17,18
With Help
11,16,19
I did find out what the answers to #1 and #20 are later but I won't post them here, or how I found out the answers, so that you won't be tempted to spoil the fun!