Ka taƙaita labarin:  Matsalar lissafi ce da aka tsara domin yara 'yan shekara 14 da ta ba mutane mamaki a dukan duniya. Ga wadanda ba su yi nasarar yin amfani da alamun da aka tsara don su jagoranci su zuwa ranar haihuwar Cheryl ba, to, amsar ita ce 16 ga Yuli. Waɗanda suka yi tunani a kan wannan amsar sun bi wasu matakai da suka sa ba za su yi la'akari da wasu kwanakin da aka ambata a cikin tambayar ba. Tambayar, 'To yaushe ne ranar haihuwar Cheryl?' yana daya daga cikin tambayoyin 25 da aka kafa a Singapore da Asian Schools Math Olympiad. Da farko, da alama ba zai yiwu a amsa ba tare da ƙarin bayani ba amma hoton da aka yi amfani da shi don yin aiki da shi. Tambayar, 'To yaushe ne ranar haihuwar Cheryl?' yana daya daga cikin tambayoyin 25 da aka kafa a Singapore da Asian Schools Math Olympiad. Ya tambaya: Albert da Bernard sun zama abokai da Cheryl, kuma suna son su san ranar haihuwarta. Cheryl ta ba su jerin ranakun 10 da za su iya faruwa: 15 ga Mayu, 16 ga Mayu, 19 ga Mayu, 17 ga Yuni, 18 ga Yuni, 14 ga Yuli, 16 ga Yuli, 14 ga Agusta, 15 ga Agusta da 17 ga Agusta. Cheryl sa'an nan ya gaya wa Albert da Bernard daban-daban da watan da ranar haihuwarta. Tambayar ta ce: Albert da Bernard sun zama abokai da Cheryl, kuma suna so su san ranar haihuwarta. Cheryl ta ba su jerin mutane 10 da za su iya saduwa da su. Mayu 15, Mayu 16, Mayu 19. 17 ga Yuni, 18 ga Yuni. 14 ga Yuli, 16 ga Yuli 14 ga Agusta, 15 ga Agusta, 17 ga Agusta. Cheryl sa'an nan ya gaya wa Albert da Bernard daban-daban da watan da ranar haihuwarta. Albert: Ban san ranar haihuwar Cheryl ba, amma na san cewa Bernard ma bai sani ba. Bernard: Da farko ban san ranar haihuwar Cheryl ba, amma na sani yanzu. Albert: Na kuma san ranar haihuwar Cheryl. To yaushe ne ranar haihuwar Cheryl? Albert ya ce: 'Ban san ranar haihuwar Cheryl ba, amma na san cewa Bernard bai san ba. Bernard ya ce: 'Da farko ban san ranar haihuwar Cheryl ba, amma na sani yanzu.' Albert ya ce: 'To ni ma na san ranar haihuwar Cheryl.' Don samun amsar, yana yiwuwa a yi aiki ta hanyar bayanai...
Matsalar lissafi da aka tsara don'yan shekaru 14 ya bar mutane a duniya suna rikicewa. Tambayar tana amfani da tunani mai ma'ana don kawar da duk kwanakin ban da ɗaya. An saita shi a cikin Singapore da Asian Schools Maths Olympiads (SASMO) Tashin hankali ya haifar da muhawara ta yanar gizo - amma amsar da ta dace ita ce 16 ga Yuli.