This is a great little intelligence test and costs nothing. Click on the link below, print off a copy or copies for yourself, family, friends or work colleagues and have fun. When I did this with some of my family, what appeared to be an easy answer for me to find was difficult for others and vice versa.
http://intelligence-test.net/part1/
Have some fun, take your time and stimulate your mind.
Be happy,
Dave.