 
<translate> Ọ bụrụ na a na-ewepụ ọkara ikuku dị n'ime tankị n'oge ọ bụla a na-agbanye mgbapụta ikuku, ole ka ọ ga-ewepụ n'ime ikuku mbụ ahụ mgbe a gbasịrị ya ugboro isii? Nhọrọ: (A) 63/64 (B) 7/8 (C) 1/4 (D) 1/8 (E) 1/16 Ugbu a, ka anyị chee echiche ntakịrị. Ụfọdụ echiche na-enweghị isi: <eng> If 1/2 of the air in a tank is removed with each stroke of a vacuum pump, what fraction of the original amount of air has been removed after 6 strokes ?
Options:
(A) 63/64
(B) 7/8
(C) 1/4
(D) 1/8
(E) 1/16 Now, let's think a bit. Some random thoughts: 