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Get ready to test yourself with some of the most baffling brainteasers of the year.

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Gergely Dudás/Dudolf, Courtesy of GalaBingo.com

ranging from tough math equations to illustrations containing hidden objects went viral this year.

Hungarian artist Gergely Dudás creates brainteasers that challenge people to find small details.

Confusion over the order of operations in a viral math problem caused a Twitter controversy.

Everyone loves a good brainteaser. From math equations that stumped the internet to illustrations with hidden objects, people enjoyed taking on viral challenges in 2019.

Here are our favorite brainteasers of the year.

Can you tell which giraffe doesn’t have a twin with matching spots?

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Which giraffe is the odd one out?

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Gergely Dudás/Dudolf