Optical illusion shows if you're 'brave on the outside' based on what you see first

You have 'eagle eyes' if you can spot odd word out in just five seconds

You have eagle eyed vision if you can find wrong word in less than 10 seconds

Optical illusion with lines is 'best' puzzle lovers have seen in 'long time'

You have eagle eyes if you can spot hidden shoe in just 12 seconds in this puzzle

You have 'eagle-eyes' if you can spot the pebble among the coffee

Only those with eagle eyes can spot the number 8881 in a sea of 8831s in 12 seconds

Only eagle-eyed people can spot the circles in square optical illusion

Only eagle-eyed people can spot the number 67 in sea of 97s in just three seconds

Optical illusion shows if you're stubborn or likeable based on what you see first

Only those with 'eagle eyes' can spot number 264 in sequence of 254s within 3 seconds

You'll need 'eagle eyes' to spot word 'seal' among sea of letters in 5 seconds or less

Only people with 'sharp eyes' can spot hidden toy in optical illusion – see if you can

People left scratching their head looking for engagement ring – see if you can solve it

You'll need 'eagle eyes' to spot word 'seal' among sea of letters in 5 seconds or less

You have eyes like a hawk if you can spot the number 725 among the 775s in 7 seconds

Optical illusion asks you to spot the snake – but only sharp eyes can see it

'Most dangerous predator' is hiding in garden snap – but people can't find it

People 'horrified' after finding creature in bush – see how fast you can spot it

VIDEO

Only the sharpest of minds can spot prickly cactus in just nine seconds

Optical illusion 'scares' viewers who focus on 'red dot' in centre for 10 seconds

VIDEO

Which animal you see in optical illusion determines whether you are 'naturally wise'

Cat is hiding in everyday living room snap – but not everyone can spot it

Tricky optical illusion has hidden beast – and people are 'too blind' to find it

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