@anon
sign up
@anon
sign up
16 sats
\
1 reply
\
@Satosora
23 Sep
\
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.
write
preview
reply
100 sats
21 sats
hot
recent
top
21 sats
\
0 replies
\
@south_korea_ln
OP
23 Sep
There is a trick.
Hint: remember the formula for (a^2 - b^2)...
reply