If you really want to find out how smart you are, try taking the Mensa IQ test. (Anything over 109 is considered above average, while less than 90 means you probably don't read Lifehacker.)
In the meantime, here are eight behaviours and attributes that are often found in highly intelligent people. How many boxes did you tick?
The infographic below comes from Business Insider and is based on a range of scientific sources. Some aren't particularly surprising (smokers tend to be less intelligent than people who abstain — well, duh), while others may raise an eyebrow (apparently, owning a cat is a sign of above-average intelligence.) You can check out the rest of the attributes below:
Of course, none of this should be taken as gospel — many of the world's greatest thinkers were noted chain-smokers while people who own more than ten cats tend to be a few sardines short of the whole tin. Also, lefties are clearly into witchcraft and should be shunned by society. It is known.
If you interested, Business Insider has a followup article that goes into each point in more detail. How many boxes did you tick? Let us know in the comments below.
[Via Business Insider]
This story has been updated since its original publication.