 
 <prompt> A cikin ruwa, wani zube monster ya kai daga ruwa duk lokacin da aka kama shi zuwa goma sha biyu da suka gabata don ci gaba da kishi. A cikin shekaru goma sha uku, ya ci 847 mutane. Jiran jiran jiragen suna da suka bude suna da mutane goma sha biyu a kowace jirage. Me mutum ne aka kama a cikin jiragen suna da zube a shekaru goma sha uku? <response>: ```Sai dai S ya kasance lambobin mutane a cikin jirgin shekaru na farko.
Jirgin shekaru na biyu ta kasance da dubu a matsayin farko, saboda haka ta kasance da mutane 2S.
Jirgin shekaru na uku ta kasance da dubu a matsayin biyu, saboda haka ta kasance da mutane 2 * 2S = 4S mutane.
Duk jirgin suna da S + 2S + 4S = 7S = 847 mutane.
Sannan, jirgin da tsuntsaye a farkon shekaru ta kasance da S = 847 / 7 = 121 mutane a cikin ta.

Sakon zai kasance 121.``` 