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/ i- v$ g5 @) m5 s; A3 Q
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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)。( P* ~% R: c9 J
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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+ x- u8 N& O# E  F注意:
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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5 r3 }6 q( j' Y
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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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; N. s9 }8 j7 Y6 C- V" \[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:% k$ Q: P; a4 b; {) R
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,
4 z/ j3 ]+ L! `$ t' v- X1 \等我搵下仲在吾在- f4 `- c2 ?% _( ^8 O0 E# k. R2 j, f

% e/ t, `7 E. H當日用左37分鐘答１２粒波子，差７分鐘才合格。
+ i* H. T% @$ E13.........
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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,
5 K1 @2 i( @6 u% A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:
. O, E5 Z. y$ X0 p唔識隱藏...已經諗到..

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sor !!!....e加改左$ j5 _( c2 @. T$ A. i$ p
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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$ u: u/ X7 O: ~* A1 u, F- H7 o
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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 X5 @" G8 r$ V# D/ O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.5 c/ H7 A% v& F% K9 `
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:6 z/ o" s+ ]6 X5 e' x
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PlayPlay, Let me know later who has the right answer and I will add points accordingly.; \* m1 e9 m2 M* _( O0 }# l1 c2 G2 o

( ]3 ]# t& A  `Thanks

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7 Y5 z! L* K; S! S5 u1 w' n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
8 l9 o$ R7 z3 F- i: x" p! ?if 1-6 = 7-12     13 is fake4 c( W4 D* S* v, w2 ~- z' o. g

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Weight the 2 time . G2 a6 o+ u  V  s" Q; l/ r

, q* s) Z- ]+ s0 v4 F4 `Suppose 1-6> 7-12
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1-3 vs 4-6
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7 W. J5 s* q) y4 wThen Weight the Third
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( T7 Z( W" Y* c: Q9 S; F- D  y- _: @Suppose 4-6 > 1-3; B3 m2 ^7 l6 T9 `
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Just like the first Step: w& h$ R: O! C
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4 vs 5 - Z& Q: X7 C: F0 \  S" f

' ~9 d2 E4 `3 ]! d. k% ]/ b% hif 4=5 6 is the fake one
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if 4>5  4 is the fake one . I7 T) m/ B& q! }( J8 r

- g$ d: o+ x  Z3 a1 r( K1 zand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
$ ]5 Y: m2 n& K7 e0 m, J7 H/ M2 WGroup B: 5,6,7,82 h) o" B* {& l) \1 e
Group C: 9,10,11,12
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5 o( b( l% \. [  lRound 1
( ~& u  Y; u  z& z2 @Group A vs Group B) P3 _% ~2 u( Y3 _+ t9 [$ X) P
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
, @5 m5 ]1 ~5 [" r+ B再在Group C拆成:
0 c1 G9 W9 S/ ?* t+ O) mGroup Ca: 9,100 C- F/ b, G: ?3 S6 H6 d) d
Group Cb: 11,12# m& q6 A5 p1 l
然後再秤, 如一樣, 即13為較輕一粒.
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5 M8 ], Z2 v# ~0 f如不同, 即較輕一組有一粒較輕波子在其中,
4 m7 o2 ?( e4 q! L要再秤, Round 3, 之後便知答案.' ^3 E6 L0 R) i
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e.g. #1 假設10為較輕的一粒9 S, o) b7 C2 }9 b# e: P
Round 13 k  B; X# O" a! F5 s
1,2,3,4 vs 5,6,7,8 = equal
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9,10 vs 11,12 = 9,10 < 11,12
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. V2 d3 t/ R( }: dRound 3/ h/ x7 }" |$ j2 A/ n1 D
9 vs 10 = 9 > 10
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The answer is 10.
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9 D1 J) _; G( @0 k/ ce.g. #2 假設7為較輕的一粒
, o- M1 y. d. ?* f7 @, b/ ^Round 14 E' R; l: Y8 Y7 U/ u% P$ w. o
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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; }+ C/ Q5 z4 |  Y0 sRound 2
" q! v9 Y1 K1 l4 {# p# Q5,6 vs 7,8 = 5,6 > 7,8" Y3 P! t/ L" I7 M" f
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Round 3
1 L" z5 l% d0 l7 vs 8 = 7 < 8
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( S+ X* T5 i, [0 A( U: n% |The answer is 7.
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. Y7 H7 Y  z4 P$ m8 b# F& R9 ?e.g. #3 假設13為較輕的一粒# k/ u& l/ l( S+ M0 f7 @4 a
Round 1
: z; E. s4 L0 \) }% y/ ~1,2,3,4 vs 5,6,7,8 = equal
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' H# ~0 ?6 @1 G3 ]4 WRound 2% v2 h, _4 O6 J8 Y
9,10 vs 11,12 = equal
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) l: z1 _+ R9 bNo Round 37 r( n: y1 M0 a$ p5 @$ q
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The answer is 13./ `7 R4 j4 F2 r- S4 s0 M1 L
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唔知我答得正唔正確呢?! ' t) p1 n( @3 {
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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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- L2 t; r2 Q" p8 L3 Q1-6 vs 7-124 Q% |" z2 Q' d& r9 ^
if 1-6 = 7-12     13 is fake
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if not
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- l$ W+ N- k6 `! f% X/ ]# }) W! TWeight the 2 time
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/ q- j# ^& \4 w1 S) H  kSuppose 1-6> 7-127 O0 o; O3 p, ^8 W

0 P% O! D) t" E1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-32 h0 V8 D& S$ P3 A! ~4 ]# [
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Just like the first Step
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$ d* [: U* K1 t4 vs 5
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one + p1 Y6 E; W) N' u, \# f1 A, }
and so on......................

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問題第二步# P# ]& T! d" R2 ?

$ [2 F& _7 g$ e7 w% ]3 s9 x3 N! DWeight 1:  1-6> 7-125 D, u  \' D8 l4 }! R

' g1 a, z6 d0 kWeight 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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問題第三步
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Weight 1:  1-6> 7-12
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: o5 \0 B5 ]' E! m  yWeight 2:  4-6 > 1-3
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; e. f! B; e6 e  v+ g0 m; u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