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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. O. U3 i+ E) P% `『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)。
/ {9 w' j7 e0 i  d& R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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4 L! b, H5 y' n4 |' Q注意:
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0 x; a# t% G6 \- l, q! t* i1. 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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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  , hide 字要連埋 , 內容 = 答案
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8 {. N' e9 M$ e4 J: Z[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
6 W8 t/ D0 W# M相信e條題目都有吾少人玩...

. Z+ Z; z7 C# P$ |3 m我以前畫左個chart去答,
& _% o2 k7 c; a, y" b等我搵下仲在吾在' p. Y) C/ \) s+ |# L# e$ k$ h
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當日用左37分鐘答１２粒波子，差７分鐘才合格。  r" i( M1 A& ?3 p; h
13.........; E7 F4 I- F6 u. E

7 \; h- N" \5 R5 y2 T) o. U  D[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:% r& i2 c$ c$ D; j& `5 J
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我以前畫左個chart去答,
4 @) R0 W; M; k. r+ J* I! N等我搵下...

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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:
9 y' W& b- Q5 T7 O+ V, D唔識隱藏...已經諗到..

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sor !!!....e加改左. G/ ?' ?. Y3 ?# t8 v( ~, I
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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0 N! W/ {, f1 J7 Y% x( M- w, I
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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:
3 \9 S0 ]+ P7 I6 U2 \) t, w相信e條題目都有吾少人玩...

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' D  m' X3 p, b/ u! qPlayPlay, Let me know later who has the right answer and I will add points accordingly.4 I; v9 V/ l$ v2 ~4 d4 R
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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+ F# l' y: n0 t# z3 [- I8 @* iPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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9 F5 l+ g2 U4 u  q( e  UThanks

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7 X3 Z( o/ v# j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% R: H& R3 {7 v3 d2 c
if 1-6 = 7-12     13 is fake) i/ \* T' {$ j% q0 w! g! Y5 @

3 M) {. Y6 F( ?2 s0 oif not
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) y2 U/ m5 `- N; QWeight the 2 time
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Suppose 1-6> 7-12" F2 m- I  t1 X$ o, K, B

7 c' v1 _+ [- B: `( `1-3 vs 4-6 , f% w* {3 B  {# ]
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Then Weight the Third
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Suppose 4-6 > 1-3' m* E5 M& }- P; F( ^4 s
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Just like the first Step
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4 vs 5 ( M# `5 M5 E( D7 @
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if 4=5 6 is the fake one ' p; W/ I# e5 \

5 s9 ?7 q) L# b6 Wif 4>5  4 is the fake one ! L% b6 g& S1 ?) q) q% q2 Y
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
. F1 p# @# Y  X( a  h- W) OGroup B: 5,6,7,8  s6 y0 J# c$ ]- F' g( D
Group C: 9,10,11,12
, I& d/ C& C& \1 hGroup D: 13
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Round 19 `7 j% m+ K& D, j8 Y2 T
Group A vs Group B
5 |. \: e3 i: Z) K4 F如A and B一樣, 即較輕一粒在Group C or D
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) i, \$ ^2 V' d) W. `4 }Round 27 k# c( t; Z0 x- e
再在Group C拆成:
& J" r4 G# _8 W4 W5 q% X. ]Group Ca: 9,10
* A( r' p) \% w2 Z; P* B) EGroup Cb: 11,124 c; d. l* d# h# c
然後再秤, 如一樣, 即13為較輕一粒.
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7 X3 J2 N  {( K; u) u  R% t0 I如不同, 即較輕一組有一粒較輕波子在其中,
1 r) v7 i* s" {6 B  I2 y- K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
& X% u$ L$ q/ jRound 1
* |1 F( r+ T7 m3 v" t* B1,2,3,4 vs 5,6,7,8 = equal
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9 f3 [0 t# u& B+ S; rRound 2- R$ ~9 k3 {* f$ }# p
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
- B" Y9 s5 n* X; {7 f7 P7 j9 vs 10 = 9 > 10
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/ p  W0 O7 ]1 ^' t2 \6 nThe answer is 10.8 {2 _* Z0 z3 R. w9 \, ^2 z. J8 o

1 L1 z$ l1 U- P6 `8 z& we.g. #2 假設7為較輕的一粒0 t9 h. [: o. L$ J# C1 j% I- e
Round 1
5 ~3 B, l8 g( s  `# s2 a1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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5,6 vs 7,8 = 5,6 > 7,8) _% Y+ b8 \4 w4 a% B) }, G

9 p1 H8 L& o: X( QRound 3
6 {3 n* {% j$ t% L: S3 I5 j7 vs 8 = 7 < 8! O: c, K( O$ y' G/ r& V
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The answer is 7.
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; S* \5 j6 L, S( n" Y3 b" u9 fe.g. #3 假設13為較輕的一粒
% b8 O% s1 }) L4 z1 `& O- _5 s, cRound 1
. D, S2 l+ ^7 P1 s6 a, M. ~' A9 y1,2,3,4 vs 5,6,7,8 = equal
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Round 2
& _# X& b2 ~% O# ?! _6 F% d9,10 vs 11,12 = equal
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No Round 3
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9 C( d: ^4 u! C. {The answer is 13.8 a) F+ q5 ?+ w1 L" c) G% G0 w
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唔知我答得正唔正確呢?! ! u- h4 j* F7 }& V

& m) @( v' P4 ?[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:' b" z( z3 Z: K( H2 y
1.7 x, A) A2 c" x; ~9 F+ Y  X
1-6 vs 7-123 R4 b' c3 i/ _  N+ ?9 Q: x
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time 8 J: a2 N. F5 ~& l9 U

2 D& P  y5 k9 H( ]/ U/ g/ qSuppose 1-6> 7-12
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1-3 vs 4-6   f' {) ^9 }) }  b2 p/ s5 o0 v1 L

5 p& p6 o6 g) m. A' S5 s; ?2 J. FThen Weight the Third% v0 k1 W, ^0 H5 {+ T4 n
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6 E2 v. l  k2 K6 {Suppose 4-6 > 1-33 p2 y" K" T% h' A! o9 }
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Just like the first Step
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4 vs 5 # m& }. H$ T* \, v$ e

# y6 W/ _, k" i0 D) D! vif 4=5 6 is the fake one
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if 4>5  4 is the fake one
' A! h2 ^* ~3 X& s  ^and so on......................

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問題第二步
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6 u7 e/ O* L) y. d' y# _2 \Weight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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) B$ t  D, C* I$ z; F: _: r你第三步点去搵 7-12 边一粒???
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; T) B; L9 z- `9 o% F問題第三步) s$ p8 D1 F: D! }$ V0 U

9 r7 h. s8 u+ G' I- J+ RWeight 1:  1-6> 7-129 ?. C" n9 K* o* }  {
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Weight 2:  4-6 > 1-3
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1 P. H# w) |( }" S% ^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