推理大挑戰(第四關)

playbr2

相信e條題目都有吾少人玩過,所以今次一於改難些少.....由12粒波子变成13 粒波子......不過對於識玩既朋友,應該都屬大同小異既啫
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『有 13 粒波子，有 12粒是重量相同的，有 1 粒是重量不同的 (沒有列明是輕了 / 重了)。
4 p% Y: B6 P- ]# k7 L; f現准許使用 3 次天秤。請解釋怎樣才能找出 13 粒內那 1 粒重量不相等 (即是重了 / 輕了) 的波子呢？』
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注意: 8 j' v: h( O1 a! B5 ^. }! U( E

, B8 P; E+ G' F% B1. 回答題目時,波子的名稱代號請用使用 1,2,3,.......至13 等數目代表, 即1 代表1號波子 , 13 代表13號波子.....以方便查證
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6 w3 |) I4 F3 T) x) P2. 請回答題目的朋友使用'' 反白功能 '' (即係將D字既颜色改為白色,白色颜色在黑色颜色上一行,透明的呢)穩藏回答答案,費事比其他人抄  , hide 字要連埋 , 內容 = 答案
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3 Z& v/ ?* z0 ^6 m& k[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:+ Y0 d) x. o+ Z+ B: x2 \
相信e條題目都有吾少人玩...

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我以前畫左個chart去答,* H, B' y- a1 W  U0 e, C
等我搵下仲在吾在! U0 u9 E# c) `( K+ G
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當日用左37分鐘答１２粒波子，差７分鐘才合格。8 T1 @+ ]* Q+ e& _8 X6 p
13.........
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[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
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7 Y5 k( j9 W, E$ l. o6 e我以前畫左個chart去答,. y! u8 a" n1 q0 v+ L8 l5 W( X
等我搵下...

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7 e: V' C6 W4 [) G" Y記得穩藏答案

16749

唔識隱藏...已經諗到..

playbr2

Originally posted by 16749 at 2007-3-1 11:35 PM:! ]( J7 U& A' m5 j
唔識隱藏...已經諗到..

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sor !!!....e加改左
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2. 請回答題目的朋友使用'' 反白功能 '' (即係將D字既颜色改為白色,白色颜色在黑色颜色上一行,透明的呢)穩藏回答答案,費事比其他人抄
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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:9 H& }5 V0 U) V0 E7 `/ \5 [
相信e條題目都有吾少人玩...

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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, E% ~" j3 @4 x! |+ PThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:# a% A! W- M0 }( \
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* D( u. y/ R# y9 h& |# VPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

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1-6 vs 7-12& w6 d, d2 i7 m4 C# G. |% h. [# r
if 1-6 = 7-12     13 is fake! I7 s, ?% g: J1 p5 w) p

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: D$ z" z0 h+ w/ u2 o' @( BWeight the 2 time " s7 {% W6 C4 H1 h3 X
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Suppose 1-6> 7-12
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1-3 vs 4-6 3 v2 I: d+ L, I" j6 t
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Then Weight the Third
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- N5 @- q9 c- S% o: n* jSuppose 4-6 > 1-3: Y* M+ K$ c8 E) F6 r1 C
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Just like the first Step1 n- d. }& W, q8 t9 L4 V# a$ S

5 Z6 `$ g( Y; D8 U4 N: k4 vs 5
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5 |7 ^  n7 O# tif 4=5 6 is the fake one # N* c: R' x; Y$ m' I, c

& _6 n1 @# m8 ]0 p8 Mif 4>5  4 is the fake one ) o5 d/ a/ P; V$ n3 W" K: v* i4 L" ^
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and so on......................

hello1997

分3組4隻波子秤$ |* Q3 l! M& {; Y7 v

: S2 K, v) ?  e- c6 o( K8 v7 J; ?) DGroup A: 1,2,3,40 H$ X: Y  i5 H
Group B: 5,6,7,8: T0 O/ n# J3 P6 E' o- n! k% b0 P
Group C: 9,10,11,121 \3 t2 K  t: V
Group D: 13
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Round 1
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如A and B一樣, 即較輕一粒在Group C or D. T4 e7 {7 v! Z9 J6 x+ R

: O+ s7 u: v0 LRound 2
: I( H. L- F8 |7 c# h再在Group C拆成:
5 s' L7 }' t2 [Group Ca: 9,10
6 p& f) V$ R3 o' `8 tGroup Cb: 11,122 q. l, g3 b# }$ K/ `8 Z) J
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
2 m* ~+ k$ C  l: Z( j, g& S要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
( I: B( D9 _7 ?; x7 x) pRound 1
( l5 W1 c9 P+ z5 b9 `1,2,3,4 vs 5,6,7,8 = equal
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% g% C3 u) G; e8 N! z( MRound 2
- C9 Y$ z2 R6 p9,10 vs 11,12 = 9,10 < 11,12
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Round 3; O6 N8 E0 T* T; m7 F8 H0 x
9 vs 10 = 9 > 10# i( o8 @4 P# }  ~
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The answer is 10.
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' M  y; E% B- @$ x2 x0 _e.g. #2 假設7為較輕的一粒
$ F  n1 h! ~0 d; c' XRound 1, q2 a0 B0 T' y; z' G& t: j+ Z
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8: m; P, a' j/ ~

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5,6 vs 7,8 = 5,6 > 7,8
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4 X" L8 S0 }$ |5 D  y# NRound 3
6 Z0 A5 H" t* G3 ]) n) p) g2 {$ u: D7 vs 8 = 7 < 8
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; X$ H1 @, b, A- g! P8 m" dThe answer is 7.
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& `1 g- s+ y* F/ Y2 z8 m9 ie.g. #3 假設13為較輕的一粒
9 x+ J* A, G3 R' V4 J% F4 ^) jRound 1+ e" [  [9 i9 v3 k4 r2 s# x0 W
1,2,3,4 vs 5,6,7,8 = equal
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- `! M5 {. q0 sRound 2
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No Round 3
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9 y4 i4 \9 s- }9 A6 [) \+ uThe answer is 13.: W2 T, U$ l2 Y5 g* f+ [, \8 Z% Q
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唔知我答得正唔正確呢?! 3 J4 J6 C1 D9 k% o

' Z- e# ?7 |4 b! v0 L[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:) Q2 [  s7 a! \1 F! X- t
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1-6 vs 7-12' h& q' {% ?+ p: G
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-12
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" q) l$ [. M/ I( r  ?1-3 vs 4-6 : E0 \" }+ ]+ I( [6 k6 U

9 d, {- [, h- i% t% J9 R6 L$ eThen Weight the Third
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+ B+ y9 y7 e$ p7 ~% \! hSuppose 4-6 > 1-3* Q3 S: c5 D7 @* C' L5 O. W

3 k- S$ p$ `( S; F3 a9 ?; I% b* J; z4 zJust like the first Step( |9 b- a6 l% X' B. c" k
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7 T# |! @( m4 \# Wif 4=5 6 is the fake one
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! B2 }4 x2 ?7 ?3 }& Nif 4>5  4 is the fake one
: D3 q2 d9 J5 q3 d' X* T6 V% s# Land so on......................

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問題第二步
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  w! G- E  x! ~- B/ DWeight 1:  1-6> 7-12' r' |8 I& M# k+ T+ J
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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3 K0 m. i1 b2 g4 R3 s你第三步点去搵 7-12 边一粒???
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========================================
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問題第三步8 W$ }+ o5 ]. z9 {5 }; a

: _' u5 n. P8 o" l6 |Weight 1:  1-6> 7-124 H  R2 s3 U; w" r& s( u

0 r2 S) j2 l( y4 E: D: rWeight 2:  4-6 > 1-3
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你又吾知粒波子輕D定重D ..... 咁点解第三步只磅4-6 吾磅1-3 . 如果個波子係輕D ,咁4-6 就一定一樣咁重