Alex and Brian are discussing:
Alex: 405 can be written as a sum of three positive cubes.
Brian: But I think 645 can be written as a sum of three positive cubes.
Who is correct?
This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try
refreshing the page, (b) enabling javascript if it is disabled on your browser and,
finally, (c)
loading the
non-javascript version of this page
. We're sorry about the hassle.
405 = 216 + 125 + 64
645 = 512 + 125 + 8