Can you spot the Santa with the sack of cash? Photo / Vouchercloud Twitter
With the Christmas season well and truly upon us, there's no end of festive puzzles sweeping the web.
However the latest eye-boggling brainteaser to leave the internet scratching their heads may just be the trickiest yet.
The Where's Wally-style quiz challenges users to spot the Father Christmas carrying a sack bursting with cash among a sea of Santas.
With over 160 to choose from, the figures are almost identical with matching hats and brown bags - except for their coats being different shades of red.
To make matters even more complicated, each bearded Santa is holding a sack overflowing with green presents - the exact same colour as the wad of cash.
However, eagle-eyed users have spotted that the Santa with the most dough is located towards the bottom right of the picture - third row up, third from the right.
The puzzle, created by Vouchercloud, is just the latest in a series of festive brainteasers to leave the internet bamboozled in recent weeks.
Yesterday, a spot-the-object puzzle from Playbuzz asked users to find the unique snowflake in a series of pictures.
The red noses of the reindeers camouflage the robin's red-breast perfectly.
There are a number of confusing elements to the puzzle, such as reindeers with patterned horns, red and yellow scarves and Santa hats which draw your eye away from the Robin.
Another seasonal brainteaser shows rows and rows of knitted jumpers, hats and scarves - but hidden between them is a bucket and spade, which internet users are struggling to spot.
The bucket and spade are exactly the same colour as the other items in the image, making them very tricky to find.
The company behind the puzzle, HolidayGems.co.uk, say the puzzle represents the winter sun you could enjoy if you're planning to jet off on holiday anytime soon.