When it comes to challenging yourself and testing out how good your observational skills are, nothing beats a good brainteaser.
They're great for putting your mind to the test and are a handy way to make the commute to work less dull. Or, for an extra challenge, sharing them with family or friends to see who can solve them the quickest provides a bit of healthy competition.
So why not try this cat-based brainteaser that challenges you to find the cat without the tail in amongst its other feline companions?