 
 <prompt> Wani mahaifi na aiki ya tafi wajen cutar rana hudu inda ba zai iya amsa aikin email ba. A ranar farko da ya tafi, ya samu 16 email saboda haka. A kowace rana daga cikin rana, ya samu yawa da yawa na email a cikin rana da ya gabata. A kan gaba, yana da email saboda haka? <response>: A ran nan guda, mai shugaban ya samu 16/2 = 8 imeyil sabbin.
A ran nan biyu, ya samu 8/2 = 4 imeyil sabbin.
A ran nan uku, ya samu 4/2 = 2 imeyil sabbin.
Sannan, a yau zai samu 16 + 8 + 4 + 2 = 30 imeyil sabbin.

Sami kunci: 30. 