A higher IQ and better focus could be the results of tackling these problems.
Most brain teasers ask you to either uncover a mistake or solve a code or identify a concealed object in an image.
The picture up top shows three passports laid out for the taking.
Readers are challenged to identify a counterfeit passport among them within eight seconds.
Now is the moment for you! Take a good, long look at the picture.
Look closely at the photo; you might be about to detect the forgery.
Is the counterfeit passport visible to you?