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) ]4 w& R4 O4 ]( s! Q8 L; s9 L; e『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)。/ A! h: M1 {' @
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？』7 b1 W' `$ L8 _2 C2 N6 B
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注意:
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5 {) t, a; x- W$ U1. 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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7 ?* A  e6 q7 H6 r+ v[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
1 ^2 M. }4 x2 D9 s& p8 W% M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,* `) z8 E+ a8 X; q& Q) L
等我搵下仲在吾在# s" l% j( s7 n0 {' [7 ?2 f8 ^! \

' H/ ]) K( ?  ]! N當日用左37分鐘答１２粒波子，差７分鐘才合格。9 A; m. m; N3 R* J7 w7 S0 U
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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我以前畫左個chart去答,8 d4 ^- T& d' c8 V9 f9 a
等我搵下...

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0 \! W- g" H, Z: k0 ?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:
+ `% e" h, a4 k2 ~9 A% C( O) F唔識隱藏...已經諗到..

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sor !!!....e加改左
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5 R# k. X: i' m8 S! |- r2. 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& y7 z' c! |6 A$ S% X  {" i7 k

8 z. t; z" r9 l5 ^[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
  e6 ]& c& L3 p/ K# {+ G相信e條題目都有吾少人玩...

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5 D  R' S( B* u) IPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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PlayPlay, Let me know later who has the right answer and I will add points accordingly., n, u8 M# \! B4 }
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Thanks

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+ `* K( k) F) e( d& o0 W) {: Z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 7-120 q8 \2 j4 M0 l7 {2 L
if 1-6 = 7-12     13 is fake
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if not
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! c9 G0 K2 z6 {7 W! FWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6 8 o' ]8 L- G) _; E

% k/ b. c( p) B+ p7 K3 vThen Weight the Third
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Suppose 4-6 > 1-3
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% u4 |8 G" P. a3 ^# E) c; wJust like the first Step
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5 y" \8 o2 V+ F2 J4 vs 5
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if 4=5 6 is the fake one
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. P# A1 N3 m0 kif 4>5  4 is the fake one 8 j/ |2 X. r, h- c. e# T
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and so on......................

hello1997

分3組4隻波子秤* j9 @: t- _1 d3 r  ]0 W( d" F0 B# p
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Group A: 1,2,3,49 j! p( F' h0 }
Group B: 5,6,7,8
' K- s! h  Z' J1 OGroup C: 9,10,11,12
, O" O" d+ O( T- ]+ c! l2 v; QGroup D: 135 S' c# ^6 u, u# [* a0 v1 M

2 n+ v' _9 I9 |% x9 @Round 1- X' U, K4 A, ]% W
Group A vs Group B% _2 p9 D: ~1 }2 U
如A and B一樣, 即較輕一粒在Group C or D+ y2 h0 M% M6 \: |: X/ ~

' Q# r" `" `4 ARound 23 x4 R) }( `* ]$ ~! v( A1 Q0 {
再在Group C拆成:
+ a* A9 |' `% Z% LGroup Ca: 9,10
! y3 R) e5 f* h3 I8 D" `Group Cb: 11,12
5 E: y9 H; ^  c" h9 Y; E然後再秤, 如一樣, 即13為較輕一粒.4 E5 \* M$ C' Q/ Q4 T
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如不同, 即較輕一組有一粒較輕波子在其中, 1 d/ z2 \5 K0 H! g5 _: H
要再秤, Round 3, 之後便知答案.; {7 a" b: H! T

) ]" |1 R( v! D4 j/ J, Ie.g. #1 假設10為較輕的一粒2 d, ]+ E; C( C$ b; x6 Z
Round 1# P% X" ]9 n* F% L/ ^8 o9 i0 r1 m7 Y
1,2,3,4 vs 5,6,7,8 = equal0 a! S/ Q2 n- ]3 a+ k4 t; F

0 Q! \: D6 @; L  Q; i% O& _, hRound 2; e0 e7 |: C2 \3 ~2 ~  O
9,10 vs 11,12 = 9,10 < 11,12! K3 V' S- j, W0 v; b) x% G# x7 A

! d; _6 C* t/ E: ~" I0 |* K8 O) DRound 36 h& T7 @- [2 c5 i9 u) A7 o
9 vs 10 = 9 > 10. U. B: S5 C( e) u: n. [+ g
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The answer is 10.* t' n! g5 i+ B; I% k

( K- ~* T+ _$ V7 k2 E9 se.g. #2 假設7為較輕的一粒! M% s; v1 }; C$ @* T
Round 17 W1 p8 z3 n* J; ?
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,85 |( I1 x) S, z3 t

, e" x- l1 v9 R6 `, E; l$ @Round 2
. w( O7 L8 _7 N3 P; ^+ f5,6 vs 7,8 = 5,6 > 7,84 P7 q. J. w/ m: h- B3 \" ]6 n  @

* m2 ?  ^/ h0 h9 |5 {Round 3
3 a5 v1 J% n" j. ]/ @5 U7 vs 8 = 7 < 8
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The answer is 7.' R9 w3 r8 n+ ?6 {4 F9 D/ L
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e.g. #3 假設13為較輕的一粒
" F) r5 {3 J0 {7 zRound 16 `" j. y$ D2 k: S' |
1,2,3,4 vs 5,6,7,8 = equal
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, `$ _4 ^8 D+ t* kRound 2% x, l, m) l# z; E: H
9,10 vs 11,12 = equal) ~/ n3 j; X5 O/ ]
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No Round 3: A3 [  o0 {$ i4 z
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The answer is 13.; r- f! y* O2 [! [
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唔知我答得正唔正確呢?! 3 I8 y4 g  L0 v; F; d
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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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1-6 vs 7-12
0 x+ }: _/ T7 \+ vif 1-6 = 7-12     13 is fake) f3 b+ y& b; r5 S

7 ?% ]& [: p5 h. b; V" Zif not
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8 N8 C; f- C0 [1 N: \6 j3 C  oWeight the 2 time
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Suppose 1-6> 7-125 T* {1 K0 B! ?/ ?" L8 S
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1-3 vs 4-6
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& U/ Y) p% l  D* @! v* {4 v$ UThen Weight the Third  Z" m( d/ l; k3 k
3.
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Suppose 4-6 > 1-35 z7 u- T5 N9 l  j7 {6 m. B
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Just like the first Step
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; y. s/ |9 ^& M4 vs 5
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if 4=5 6 is the fake one ! d8 N+ a1 P2 g. G$ o1 b' l" S2 ^

& J! _+ v- x! P/ D; hif 4>5  4 is the fake one
5 Z8 B) ~" c& T( eand so on......................

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問題第二步
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Weight 1:  1-6> 7-12
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* k; \4 e# L" W' mWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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3 L5 K8 b5 O0 A" O0 F7 l( X" E/ t你第三步点去搵 7-12 边一粒???+ X& p2 G* c0 U. a! @$ d3 P1 B3 Y

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8 B) K7 o# C% V/ @問題第三步' R% E9 z, C8 e/ W/ E$ ^

0 ~/ B& u( L: s, B+ ?1 @5 \& XWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 0 ]/ x2 d8 H( U3 c" I- u6 {9 b8 F( [
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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