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0 sats \ 0 replies \ @025738dda8 23 Sep \ on: (999^2 - 1)/998 charts_and_numbers
No paper, just in head...
Some easy facts:
1000*1000=(999+1)*(999+1)
999*1000=999,000
1000-999=1
The hard mental math:
999*(1000-1)=999,000-999=998,001
Ok, now it's obvious: (998,001-1)/998
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