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' s% M: y1 J1 r2 {" }# m- A; \  y

0 m3 Q6 _; u; \% g) O0 Y' @『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)。1 [9 {9 U- T) P. e/ U0 z: T
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: ) r: t( v2 T; {$ n/ s. I" r
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1. 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! }" b4 J. X! o, x& S
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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) V  w# w2 U& F1 X" F- g  B
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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
/ ]8 r' w) I, Q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,7 m) u9 i6 Y  p  K' a" o9 z
等我搵下仲在吾在3 H9 G2 \+ V$ z" G7 L. h6 M
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當日用左37分鐘答１２粒波子，差７分鐘才合格。+ q; b. W+ J& P/ b8 U0 A& |9 _  R8 N
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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5 H, W0 I' X* `1 Q- O- M. b; _我以前畫左個chart去答,
) j  ^* r9 j) A) D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:
" W$ C+ `! C) {1 _, t唔識隱藏...已經諗到..

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  C& {1 g5 v1 Q( f+ ~: |. Ksor !!!....e加改左, n- r0 n7 G1 U
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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: \0 m9 m6 |9 `" n0 a; R
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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:
1 U) I: @: E6 A" `' H" K! Q相信e條題目都有吾少人玩...

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! M9 S. N' i& z& yPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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/ V8 O4 R  V7 |  {Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:& B# n/ D# \' C" \
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.  t& k) w& c, l; I4 Y6 S
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Thanks

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9 s8 X- C9 Y. E5 ]; X不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
2 ~& r% a: N5 W& _1-6 vs 7-12+ ~/ @, H5 H1 {5 X: p# }! S
if 1-6 = 7-12     13 is fake
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if not ) Y  C6 _/ u; b& A4 U

& |/ _; W6 E/ J2 |$ o, r; _, uWeight the 2 time
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+ K2 q8 \1 `* GSuppose 1-6> 7-12* W( Q8 a5 c. m1 I* r: t
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1-3 vs 4-6
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4 b: M) N1 _: q% n* C4 _Then Weight the Third( @% M) \) q0 C0 `
3.
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/ H  h# F# B$ H% _0 MSuppose 4-6 > 1-3
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  ?: F: S, S0 j, e# l8 t7 }Just like the first Step2 u& j3 V. u" ]8 \

! E6 z3 a3 B' z2 g$ D. d8 A) i4 vs 5 & n/ |: e! Q! T' D* D  w

! g/ T& C4 v  K6 Zif 4=5 6 is the fake one
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if 4>5  4 is the fake one
  p/ [0 O* J6 D- x/ Q$ i6 V' c" `1 ]. C/ E7 r/ e
and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
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Group C: 9,10,11,126 B  w4 n  Q$ F5 a) M3 S6 d$ H
Group D: 13" K/ w' g' @% s# s
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Round 1
* `$ ~: {/ b" y: z7 sGroup A vs Group B+ _0 A2 v' Z# y  n
如A and B一樣, 即較輕一粒在Group C or D3 q; P' E6 B, S& G$ a. V
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Round 2, ~: A9 _0 W% o2 Q6 c
再在Group C拆成:; e/ V1 z/ u" J' Z
Group Ca: 9,10; t1 i' K! T' p, S2 C6 g' V, d0 A
Group Cb: 11,129 r: U. b7 B' X+ d
然後再秤, 如一樣, 即13為較輕一粒.* d; s2 S* k, ]* ?0 b+ `

' o; ?& M. w* S, f2 ]2 H2 Z如不同, 即較輕一組有一粒較輕波子在其中, 4 R3 x1 s% O/ v: k) U$ s
要再秤, Round 3, 之後便知答案.* I. m& d4 f) ^2 @/ E

% j7 y: a. u* t3 I3 n5 T" l1 ye.g. #1 假設10為較輕的一粒
7 {; x2 C. ?) l: |: P3 Z6 sRound 1
& m7 l+ Q: b5 f8 v5 Q1,2,3,4 vs 5,6,7,8 = equal
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* ?4 s1 S3 f7 K6 K+ i+ x4 ]6 C. jRound 2
: P5 t! v9 C" q( p) F" H9,10 vs 11,12 = 9,10 < 11,12
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Round 35 U6 q7 Z: N. c1 C
9 vs 10 = 9 > 107 X( l! `3 n  A2 [% ?" ]
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The answer is 10.% j$ I& s1 X+ S- M0 m0 X& k
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e.g. #2 假設7為較輕的一粒: j( b; Q" p; a- R9 [
Round 1
1 w- ]# u' ^# ]1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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* ~" F' a. y: ~$ @5 B1 h4 TRound 2
2 }/ G3 l6 u) N1 n5,6 vs 7,8 = 5,6 > 7,8. n. m6 F& k6 `4 V
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Round 3% O- @' f9 J, n7 k0 l
7 vs 8 = 7 < 8
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The answer is 7.0 v$ R) I5 ?+ s2 v# A6 h- r5 Z, {

( w; H6 d. z5 ~, c# }% c& p9 k. Se.g. #3 假設13為較輕的一粒
# [- I$ i1 X+ v& L" `$ nRound 1
% e( d9 ~* P( A/ ^0 n: I9 r4 f& Q1,2,3,4 vs 5,6,7,8 = equal7 c. W. |9 ?& J7 y  D8 y3 Q' Z
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Round 2
8 P) u( \% x3 d" j+ R9,10 vs 11,12 = equal
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No Round 3( y+ T) j( A5 _! E' O6 }( Q- j" |
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The answer is 13./ ]; @" ]6 p- Z, V
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唔知我答得正唔正確呢?! . M5 y/ G! @: a1 ]
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[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
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0 {: i9 V, B0 ]( s! B1-6 vs 7-12' L" }+ R; x* ~; Z6 h7 c0 o( R2 n
if 1-6 = 7-12     13 is fake( p& H; G5 Y( x, m
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if not
8 N' ~' A3 R$ M, \9 h1 N( q1 m
8 G5 d: z6 e& m) qWeight the 2 time
7 q, j. p/ Z2 S$ f+ o
4 c! ?# A& L( B/ I% D! X. ]- NSuppose 1-6> 7-12, m+ I6 Q- ]0 P/ E, d2 W. i; E- L

2 y  G) V' ]( @* v1 l5 }1-3 vs 4-6
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6 `* J3 l' ?1 ]2 IThen Weight the Third
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* r5 |% }# m  b- i: k+ k
Suppose 4-6 > 1-3" J8 A# y1 H  }# r
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Just like the first Step8 u! o- f6 ], q) G+ o
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4 vs 5
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) B. T5 X' z+ hif 4=5 6 is the fake one   f3 D' x+ m" {
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if 4>5  4 is the fake one 8 K# z$ _" N; E0 \
and so on......................

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問題第二步
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. x$ j, n  X$ Q3 {! sWeight 1:  1-6> 7-12
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' Z' q7 h; G( T/ OWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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你第三步点去搵 7-12 边一粒???( u/ w4 @2 i9 e1 m2 G

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4 g) k* D/ n, D  A# s問題第三步- B# F1 q+ U0 O7 ~3 a; Z/ z
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Weight 1:  1-6> 7-12
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Weight 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