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16 sats \ 1 reply \ @Satosora 23 Sep 2024 \ parent \ on: (999^2 - 1)/998 charts_and_numbers

doing it on scratch paper helps.
I thought it was going to be a lot harder.

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21 sats \ 0 replies \ @south_korea_ln OP 23 Sep 2024

There is a trick.

Hint: remember the formula for (a^2 - b^2)...

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