@anon
sign up
@anon
sign up
pull down to refresh
10 sats
\
2 replies
\
@ek
23 Sep
\
parent
\
on: (999^2 - 1)/998
charts_and_numbers
mhh, lol, I didn't think of calculating 999^2 in my head ... I thought there must be a trick somewhere.
write
preview
reply
100 sats
37 sats
hot
recent
top
16 sats
\
1 reply
\
@Satosora
23 Sep
doing it on scratch paper helps. I thought it was going to be a lot harder.
reply
21 sats
\
0 replies
\
@south_korea_ln
OP
23 Sep
There is a trick.
Hint: remember the formula for (a^2 - b^2)...
reply