Fibonacci
Iyongerekana rikurikira urukurikirane 1, 1, 2, 3, 5, 8, 13…: intambwe imwe imbere inyuma y'igihombo, intambwe zibiri inyuma inyuma y'itsinzi.
Mu nsiguro
Rituje kuruta Martingaleingendo yo gutegaMartingaleIyongerekana rikuba kabiri itego inyuma y'igihombo cose. Raba igice c'Ingendo zo gutega umenye ivyo bukora n'ivyo budakora.Soma vyose →, ritinda kugarura amahera, kandi rigarukira ku rugero rw'amezaamezaUrugero rw'amezaItego ritoya n'irinini kuruta ayandi vyemewe. Urugero rwo hejuru ni rwo ruhagarika iyongerekana rikuba kabiri.Soma vyose → rumwe; igihombo citezweimibareIgihombo citezweAgaciro kitezwe gakubwe n'amahera yose yateze; ni amahera y'impuzandengo atakara mu gihe c'ugukina canke mu gihe runaka.Soma vyose → ni 2,70% vy'igiteranyo c'amategoamaheraIgiteranyo c'amategoIgiteranyo c'amahera yose yateze mu gihe c'ugukina canke mu kiringo, harimwo n'ivyatsinzwe vyongeye gutegwa. Kandi bita: handle, action.Soma vyose →.
Leonardo w'i Pisa yasiguye urwo rukurikirane mu 1202 nk'akarorero k'ukwororoka kw'inkwavu. Rwashitse ku meza ya ruleti nk'imyaka 700 inyuma biciye ku buryo bwo gutega butazwi uwabuhimbye.