Apparently 80% of people can't get all three correct.
Not a lot of us probably know our IQ's (intelligence quota), finding the time to sit through a long official test is something that doesn't appeal to many a person.
But if you've been wanting to gauge whether you're more of an Einstein or a Father Dougal Maguire, then the world's shortest IQ test could be for you!
The test is made up of just three math questions... but be warned that they certainly aren't a walk in the park, in fact more than 80% of people reportedly fail to get all three right according to the Mirror.
It's called the Cognitive Reflection Test, and was originally part of a research paper published in 2005 by MIT professor Shane Frederick.
Professor Frederick had more than 3,000 participants from a range of educational backgrounds complete the test - and incredibly only 17 percent managed to score three out of three on the test, meaning 83 percent of people failed.
So how will you get on?
Here's the questions: (The correct answers are below)
1. A bat and a ball cost $1.10 in total. The bat costs $1 more than the ball. How much does the ball cost?
2. If it takes five machines five minutes to make five widgets, how long would it take 100 machines to make 100 widgets?
3. In a lake, there is a patch of lily pads. Every day, the patch doubles in size. If it takes 48 days for the patch to cover the entire lake, how long would it take for the patch to cover half of the lake?
The correct answers are:
1. 5 cents
2. 5 minutes
3. 47 days
Still confused?
Scratching your head (we certainly were)? Thankfully, Presh Talwalkar, the author of The Hoy of Game Theory: An Introduction to Strategic Thinking explained the answers in his blog.
1. Say the ball costs X. Then the bat costs $1 more, so it is X + 1. So we have bat + ball = X + (X + 1) = 1.1 because together they cost $1.10. This means 2X + 1 = 1.1, then 2X = 0.1, so X = 0.05. This means the ball costs 5 cents and the bat costs $1.05
2. If it takes 5 machines 5 minutes to make 5 widgets, then it takes 1 machine 5 minutes to make 1 widget (each machine is making a widget in 5 minutes). If we have 100 machines working together, then each can make a widget in 5 minutes. So there will be 100 widgets in 5 minutes.
3. Every day FORWARD the patch doubles in size. So every day BACKWARDS means the patch halves in size. So on day 47 the lake is half full.
So how did you get on?
