Uploaded June 2026 | Updated September 2026, 2 weeks ago

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Math tutorial explaining the math meme from Reddit: Is 18+18/6=6?
This is not just a usual PEMDAS problem meme, but also involves a unusual notation called "termial", which is the "?" for the triangular numbers.

0:00 Math meme from Reddit
3:57 Why 1+2+...+n is called the triangular number and how to find a formula for it

The original post: reddit.com/r/mathmemes/comments/1ubv4zy/guys_you_wont_believe_it

The Math Stack Exchange: math.stackexchange.com/questions/60578/what-is-the-term-for-a-factorial-type-operation-but-with-summation-instead-of-p
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