Twitter

This simple looking sum went viral and has got people very hot under the collar

This simple looking arithmetic is not as easy as it looks. Or maybe it is. Having read most of the comments it prompted, we’re not sure we know anything anymore.

Okay so the fury about the people who ended up with 13, we can all agree on that. But 16 not the right answer? Are you sure about that?

What better way to find the answer than ask Twitter? Right? Er, maybe. Here’s what people made of it.

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It’s a sign of the debate it started that the tweet has been retweeted 150,000 and liked more than 300,000. That’s, like, twice as many likes as retweets. Is that right? Anyway, back to the original question.

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It’s about here our eyes started to sweat.

13.

Quick, someone ask Donald Trump.

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