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Jan 30, 2020

We Spent All Day Arguing About This Triangle Brain Teaser. Can You Solve It?

Posted by in categories: internet, mathematics, neuroscience

There’s nothing quite like a maddening math problem, mind-bending optical illusion, or twisty logic puzzle to halt all productivity in the Popular Mechanics office. We’re curious people by nature, but we also collectively share a stubborn insistence that we’re right, dammit, and so we tend to throw work by the wayside whenever we come upon a problem with several seemingly possible solutions.

This triangle brain teaser isn’t new—shoutout to Popsugar for unearthing it a couple years ago—but based on some shady Internet magic, the tweet below reappeared in my feed today and kick-started a new debate on our staff-wide Slack channel, a place traditionally reserved for workshopping ideas, but instead mostly used for yelling about other stuff that we occasionally turn into content.

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Comments so far


  1. Pete Wilkes says:

    I found 12, unless I turn it on its side and then they all disappear.

  2. David says:

    Found 18, not counting the lined paper.

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