Question

mot dan vit troi dng bay gap mot con vit troi bay bay theo chieu nguoc lai . con vit nay cat tieng chao mot tram ban a . con vit troi dau dan lien tiep ;ban nham roi chung toi khong phai 100 ma chung toi them chung toi them 1/2 chung toi , them 1/4 chung toi va them ban nua  thi chung ta moi day 100. hoi dan vit troi co bao nhieu con

Answer 1

Dan vit co 36 con,bai nay co trong 400 bai toan lop 5,minh lam roi,co giao bao 36 con la dung