鼠穴JJ 126题

northface

搜索“2-height”出来的考古…… http://www.chasedream.com/show.aspx?id=94&cid=40

zhu8809

谢LZ~~

yiw006

10、For all x, x is positive integer,  "2-height" is defined
   to be the greatest nonnegative n of x, what is the
   greatest number of 2-height when 2" is the factor of x?
A. 2
B. 12
C. 40
D. 76
E. 90

Answer: (by Anchoret)
A. 2=2^1
B. 12=2^2*3
C. 40=2^3*5
D. 76=19*2^2
E. 90=45*2^1
B is the answer.

為什麼不是Ｃ？

謝謝LZ!

northface

10、For all x, x is positive integer,  "2-height" is defined
   to be the greatest nonnegative n of x, what is the
   greatest number of 2-height when 2" is the factor of x?
A. 2
B. 12
C. 40
D. 76
E. 90

Answer: (by Anchoret)
A. 2=2^1
B. 12=2^2*3
C. 40=2^3*5
D. 76=19*2^2
E. 90=45*2^1
B is the answer.

為什麼不是Ｃ？

謝謝LZ!

-- by 会员 yiw006 (2011/3/11 14:49:50)

我觉得就是C。。可能anchoret笔误吧~