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Everybody can see rows and rows of batteries in this image, but only those with a high IQ can reportedly spot a missing battery - can you find the elusive item within 38 seconds?
Only people with 'super vision' can spot the stealthy crab in under 35 seconds in this image as it's so well hidden - do you think you're up for the seriously tough challenge?
The 1% Club is known for it's difficult questions, and ahead of the return of the show, put yourself to the test and see if you have one of the sharpest minds in Britain
Test your cognitive abilities with this brain teaser. Spot the hidden error in under 10 seconds. Only 1% of people can do it. Challenge yourself now!
Only Connect's question editor Jack Waley-Cohen is known for cooking up fiendishly difficult puzzles, and he's compiled some more for you to try - can you solve them?