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+ n+ r2 A! C8 W' [/ j/ G% B% i

/ _8 @* ]; `( @9 C『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)。
+ Z( z( M7 R  z( l8 B/ ~8 `: Z! @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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: L$ z" f% W; r注意: 5 l' r2 G; s1 k6 h# ^
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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- [: g5 y; V) a. w# o" 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  , hide 字要連埋 , 內容 = 答案  w' b! }" }; A5 b. _1 K
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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:+ r$ ]4 L7 G; n6 T: M8 U3 o
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,
! V8 X- t6 M9 o: V' @$ ?+ T等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。$ ?  e' x5 |1 T1 L; i0 x
13.........; M% H2 g9 F* o3 q  T& O

% m* s  e& f+ V" j9 _[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:9 ]2 o) J8 Q! {
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我以前畫左個chart去答,$ o9 `& [2 r( k0 Q! R
等我搵下...

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/ I) p1 k9 @" s/ g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 l; o8 r* T7 K
唔識隱藏...已經諗到..

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sor !!!....e加改左" t" y/ [0 l6 X9 R; f: I/ _3 Y* ^; z
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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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# S3 g7 d0 Y0 s+ R. r[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
. F$ S/ V  Y5 A" p3 }8 Q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.: j+ P9 ]: s, B: v

& ]1 S* i$ Z5 Q- rThanks

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.
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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

1.
* Q# b4 ^' Z+ Y, m1-6 vs 7-129 ^  U8 T1 H2 q5 Z
if 1-6 = 7-12     13 is fake
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Weight the 2 time & M- H5 p9 F  ?8 l- @! \
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Suppose 1-6> 7-12  J+ l! r: D9 S# i
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1-3 vs 4-6 5 S, z+ |8 L& N, u9 t3 ?
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Then Weight the Third- E' w! R4 r0 s. A
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Suppose 4-6 > 1-3
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7 z" G2 f4 v6 e+ `, J1 f( d( |' n7 zJust like the first Step4 s* U1 J3 P2 Q. t7 a: ^/ h
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4 vs 5 : L: U5 |6 R' H" V, e) Z, B4 Q

8 g5 ^# x$ z2 H3 K+ Oif 4=5 6 is the fake one
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0 C: q- Z) p& |  Aif 4>5  4 is the fake one + V4 e: @" t( Z' M0 o; T/ v
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and so on......................

hello1997

分3組4隻波子秤/ A9 j% Q( j" R5 i3 D. I, P. |

- Q' q* d- a: O* Y3 J; ]& zGroup A: 1,2,3,4
! W) `! `+ U0 r) \7 m* P% s; nGroup B: 5,6,7,8
$ J+ g% Z" m' O" F( W7 G6 Q) r1 UGroup C: 9,10,11,12. H+ C# G( p9 T8 e' g$ ]
Group D: 13
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, @. v, q5 O: W' a, q2 NRound 1: h% e1 x9 b2 Q2 O$ l: l/ r; x
Group A vs Group B
4 T% J& O3 p1 B$ N4 K$ o) d如A and B一樣, 即較輕一粒在Group C or D) W4 K+ P. w9 V- K# O

$ _7 s# t) \; L. K+ C! w5 oRound 20 M- ]1 j' p9 h0 ?* `1 C
再在Group C拆成:
; z( c  A: H# G& YGroup Ca: 9,10
; r+ j. L4 {* ^. vGroup Cb: 11,12# M9 s+ B2 A# d* W: D; k
然後再秤, 如一樣, 即13為較輕一粒.$ C! i0 Q) K  h" Q/ \; \- j

7 o7 z5 n$ V- i( z9 k如不同, 即較輕一組有一粒較輕波子在其中,
: z5 ~2 k: T8 g5 k$ J: p$ W) `* G要再秤, Round 3, 之後便知答案.6 u7 b, p4 j6 ]3 k0 m$ d. L
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e.g. #1 假設10為較輕的一粒/ w) L: R; g9 m9 z% i
Round 1! {& }  G) m2 ^$ h7 Z
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
2 T) n4 @' C6 @5 t5 k9,10 vs 11,12 = 9,10 < 11,12
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Round 35 C. ]" u# z5 s6 z6 ^
9 vs 10 = 9 > 10
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' E, I9 C, j" \5 \, I3 ~7 FThe answer is 10.% Z& c3 \+ I" c( W# @
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e.g. #2 假設7為較輕的一粒
8 k5 |% O  E8 fRound 1
" G# q- c0 O% W6 m9 B8 L/ Q1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,89 x0 G. W2 t3 D8 |. S8 t! |  O
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Round 2( W1 v# [7 p4 V& c2 A) F4 Q. C
5,6 vs 7,8 = 5,6 > 7,84 J# D  T9 P7 K7 k2 A( V  ^

/ O4 A  |) k) D/ f! i9 f' kRound 30 E0 |; V; V+ f8 e% R
7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = equal9 l+ i& Q+ N6 J- J
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Round 2  a' X# j& V1 I& D( f4 ?* g
9,10 vs 11,12 = equal6 U6 X) i, C5 v; n& ~

$ S% I$ O5 \0 b; MNo Round 3
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* Y0 y/ c' A* G# ~4 f- gThe answer is 13.
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' ^  k: R& `; }# T* H& ~* Q! Y唔知我答得正唔正確呢?!
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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" u, \( |, }  f% L* i# X& F
if 1-6 = 7-12     13 is fake
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" O# S6 `7 Q  u  V% dif not
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Weight the 2 time
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4 W9 _9 L- Y4 \6 u/ Y8 E, `$ `, B; ?Suppose 1-6> 7-12
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1-3 vs 4-6 1 v- a( J  ?/ n: \! P3 K; r, Q

3 k! U) v4 D" t) n6 `Then Weight the Third
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Suppose 4-6 > 1-3- H) i: T( }$ q' z1 H9 F
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Just like the first Step5 Y# a1 y7 k- i2 i6 _
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4 vs 5
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5 P1 Z4 _, \0 d' zif 4=5 6 is the fake one
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if 4>5  4 is the fake one 8 z  O3 |1 ~  w# w& S1 Q! m$ i
and so on......................

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# o6 v% B; ]& A1 e& i0 o  E" ]問題第二步: e1 `. G- Y0 `' Q1 N# u

3 f! g7 U- b' N) ~% R* I. pWeight 1:  1-6> 7-12* q5 r% q# n; r% ~- i8 D

3 S% ?( f* I$ |Weight 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???
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========================================5 `1 L; w6 {0 Q

0 |0 E' R# d0 \問題第三步
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  X0 N% Q3 w' ^8 XWeight 1:  1-6> 7-12( Y5 p) M0 y" @: k
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Weight 2:  4-6 > 1-3
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) w4 ~) S% b- p, f: d7 A6 B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