返回列表 回復 發帖
look
.....
look :024:
好易囉……
what?????
不知道啊啊啊啊啊
:onion14:
gooooot!
Divide the 12 balls into 4 groups of 3's.
. `% k2 ?) H! H, P0 I# H) Utvboxnow.comWeigh group 1 & 2
" |5 X; s* |0 N- d# q. z9 N- Ctvb now,tvbnow,bttvbthen weigh group 2 & 3
; G) c* K3 i2 g& [* pIf the results are Equal & Equal, it means the ball with the different weight is in group 4.
. ]: s! Z; S/ oIf the results are Equal & Unequal, it means the ball is in group 3.
: a8 U- f0 h* }7 E6 U6 x  y3 rIf the results are Unequal & Equal, it means the ball is in group 1.
. N# D5 a6 C' E; ?, X& btvboxnow.comIf the results are Unequal & Unequal, it means the ball is in group 2.
6 [& c8 Q$ D% f  v9 J6 [
' A6 Y( a! D# {/ V# \公仔箱論壇Once you determine the group that contains the ball.公仔箱論壇& f$ S; c" p% ?+ q* z  }6 B6 B8 C
Simply weigh two of the balls
:019: :019: 怎样哦....
答案﹕記住有個波唔同重量,但從來無講過係重左定輕左。先將12個波分3組A,B,C每組4個,將A,B拿去稱,如果A=B THEN [CASE 1], 否則 [CASE 2]
[CASE 1]tvb now,tvbnow,bttvb: @3 _# l) @. Q& w
個異重波係C組,即其他A,B組都係正常波,好易搞,將C組其中兩個波同兩個正常波稱,如果重量不同,即所拿去稱的C組兩個波中有異重波,如果相同重量即 C組餘下兩個波中有異重波,再將兩個含異重波的其中一個同一個正常波稱,如果重量不同即拿去稱的就是異重波,如果相同重量即餘下未稱的一個C組波就是異重波。
[CASE 2]
) E5 d; |0 r: y: `重D果邊叫A組,輕 D果邊叫B組,為方便稱呼,將A組編為A1,A2,A3,A4,B組編為B5,B6,B7,B8,而頭先C組果4個則是正常波。A組重過B組,即異重波可能是在A組[較正常波重]或在B組[較正常波輕],將A1,B5加一個正常波同A2,B6,B7稱,A3,A4,B8放埋一邊。結果有以下三個﹕
1) 如果A1,B5加一個正常波果邊重D,即異重波可能是A1[較正常波重]或B6,B7[較正常波輕],因為只有佢地同第一次稱果時比係未調過位,咁再將B6同B7稱多一次,邊個輕左邊個就係異重波,如果一樣重咁A1就係異重波;
2) 如果係A2,B6,B7果邊重D,即異重波可能是A2[較正常波重]或B5[較正常波輕],因為佢地同第一次稱果時比調左位就即係改變左天秤重量的方向,咁將A2同一個正常波稱,如果A2重左咁佢就係異重波,否則B5就係異重波;
返回列表