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Don't Google, no AI, just play around with your calculator...

Don't spoil it for others if you already know.

Inspired by #1482916

mm, I see that 14 + 28 + 57 = 99 and 142 + 857 = 999, but dunno if that's what you're going for.

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Nice find, but the one I know of involves multiplication...

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1+8=9
4+5=9
2+7=9

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I love this math jewel!

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It's the first uninteresting number?

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hmm, i'm stumped (for now)

but i ain't gonna google it

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