Yini ekhethekile ngenombolo ethi 1729?
Context:Inombolo engu-1729 yaziwa ngokuthi inombolo kaHardy<unk>Ramanujan ngemva kokuvakasha kukaHardy edumile eyobona uRamanujan esibhedlela. Ngamazwi kaHardy:  Ngikhumbula ngivakashele kuye lapho egula ePutney. Ngangigibele itekisi elinenombolo engu-1729 futhi ngaphawula ukuthi le nombolo yayibonakala kimi ingeyesidina, nokuthi ngangithemba ukuthi kwakungeyona isibonakaliso esibi. Waphendula wathi, "Cha, yinombolo ethakazelisa kakhulu; inombolo encane kunazo zonke engachazwa njengenani lamacube amabili ngezindlela ezimbili ezihlukene".  Ngaphambi nje kwalokhu kulandisa, uHardy wacaphuna uLittlewood ethi, "Zonke izinombolo eziphelele eziyinhlanganisela zazingabangane [bakaRamanujan]".  Izindlela ezimbili ezihlukene yilezi:  1729 izinyanga = 1 1 3 Izinketho + 12 izinyanga 3 Izinketho = 9 izinyanga 3 Izinketho + 10 izinyanga 3 Izinketho . futhi. {\displaystyle 1729=1^{3}+12^{3}=9^{3}+10^{3}.} Ukuhlanganisa lo mbono kuye kwaveza umqondo "wezinombolo zamatekisi".
I-1729, eyaziwa njengenombolo kaHardy<unk>Ramanujan, iyinombolo ephelele encane kunazo zonke engachazwa njengenani lamacube amabhangqa amabili ahlukene ezinombolo eziphelele.