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! J5 }6 A" k
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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)。/ h2 {1 j4 o3 k3 m' N
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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& _7 Y5 Q& Q* h0 T' c注意: 8 f( S+ b: t! P: m
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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7 w' Y: m9 \0 o

" F$ I2 U2 u' w0 Q2. 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$ d$ z" `8 G6 M& ?/ ?
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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 J3 U% s2 I1 `8 l
相信e條題目都有吾少人玩...

) p2 t% P  A- I; {  x3 ^我以前畫左個chart去答,
2 n- N- f$ I9 W: I3 h6 {$ _等我搵下仲在吾在1 [' @$ J! ]7 Z
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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: G( g; @' ~( K* ?[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:, V9 D0 ]; m! p9 @4 x& b/ w
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我以前畫左個chart去答,
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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:
/ U9 I' ^0 g3 p唔識隱藏...已經諗到..

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sor !!!....e加改左+ N( \, q6 P8 O& Z# r

, x8 B3 q" t3 }' _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' x: D$ u& T% I; c4 @! v

" k  A: D5 l$ A) e% i# i7 T[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:8 x( A, C: g0 r% j& |, D
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.
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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6 w/ V" a! v! ?! b2 |% \3 lPlayPlay, Let me know later who has the right answer and I will add points accordingly.6 W, W) M9 J7 @$ g( Q

6 f+ ~, @' o1 h$ D) Q1 z$ BThanks

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( [8 J+ l% K, i7 i) s不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
2 l3 [4 p1 |- b, C6 l1-6 vs 7-129 O" s# |3 G1 I" W
if 1-6 = 7-12     13 is fake2 S$ h; \, `, T& v9 K7 ?3 |0 A4 {

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Weight the 2 time
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! J1 w& e4 O! m9 J( a; g3 pSuppose 1-6> 7-12  q% O3 R5 n" A& {, K  i; d6 n
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1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3, D/ N) J  o+ }% f4 T

& P% S) N" @, v" V0 S9 r4 e  W6 UJust like the first Step9 e$ X- ?- J) k% l5 b! l8 i% _
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4 vs 5
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9 Z: p9 ^2 |0 _" o  g$ @- Z3 {if 4=5 6 is the fake one
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if 4>5  4 is the fake one 3 x  C0 v* F% U; P4 ?8 H
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and so on......................

hello1997

分3組4隻波子秤
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' n# @7 l) L5 d& L+ u% u6 N- S& LGroup A: 1,2,3,4
; L: B" I! C9 |) G' K: bGroup B: 5,6,7,8! b7 ], ^+ O) {4 b7 b
Group C: 9,10,11,12
6 l' C+ m% V) l4 J$ `Group D: 13
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Round 1
1 ~- o1 p, z- c) y% kGroup A vs Group B8 s8 c3 a2 q& `8 A3 u6 Z
如A and B一樣, 即較輕一粒在Group C or D
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5 j  h4 y7 L# h* U7 I% wRound 2
! C1 \* K8 P8 p! V* R: G7 O1 y再在Group C拆成:
3 r3 P6 e# u3 W& hGroup Ca: 9,10) q3 `5 d' g7 Y: {- B
Group Cb: 11,12
: G: Q# ?# k" R/ S2 c然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, , B/ w" C) [9 K
要再秤, Round 3, 之後便知答案.6 N$ O' F2 {4 \1 c- Y* B
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e.g. #1 假設10為較輕的一粒7 d% v% h0 A! E( T) s1 y" `
Round 12 Y# f5 r* P* T- Z0 X) _
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
; b% z6 u# o; a$ G( i9,10 vs 11,12 = 9,10 < 11,12
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( E2 f& q" W0 C* k. TRound 37 ]+ Q) [; A; b- t- D( {" D
9 vs 10 = 9 > 10
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The answer is 10.: M* o7 y4 d4 G: \- Y$ x- g
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e.g. #2 假設7為較輕的一粒
0 `7 e+ m. L1 |7 \Round 1
$ U! ]: z3 B+ B/ G1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,88 X/ j4 u9 Y+ z" I+ b

: q9 |( H' c# D/ \Round 2
2 t3 i  B6 M0 s7 v6 H' u% C( h5,6 vs 7,8 = 5,6 > 7,8
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4 U9 j" o5 J; J* W7 B3 U# MRound 3( X2 Z" w# j8 r. x) }8 X
7 vs 8 = 7 < 8
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The answer is 7.
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. A+ R2 [# l' f$ u% te.g. #3 假設13為較輕的一粒
9 c; w9 U9 p9 b. k! @Round 16 F1 E  S2 h8 D
1,2,3,4 vs 5,6,7,8 = equal$ t7 Q8 |5 P8 W0 v1 U8 K! Q, B- E
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Round 2+ F8 F. F8 J5 a" J
9,10 vs 11,12 = equal
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No Round 3% Y' y/ p5 t2 X; L. v, V

6 ]$ O, d) J6 I2 [/ s' R( t: LThe answer is 13.
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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:; L( y, D5 C  w. J0 F
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1-6 vs 7-128 P5 f$ o; \; J' O& f- e
if 1-6 = 7-12     13 is fake5 a2 j8 {! T9 Z+ }& k

' K% p$ j; F1 `1 R4 pif not ( w% U$ j0 J9 [/ F4 I7 S- l5 O; b

$ L3 z' n8 F: c% x7 C! QWeight the 2 time
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Suppose 1-6> 7-12% w! d9 t5 [! Z# {" O6 Z
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1-3 vs 4-6
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Then Weight the Third# J; W9 n- f0 U
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Suppose 4-6 > 1-3
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( A5 P4 i8 g; tJust like the first Step) f( `5 d& I6 U& U& x
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4 vs 5   C( @, p- U% ^# |# w

/ g# j- N3 e0 _" Hif 4=5 6 is the fake one + J5 c/ r6 Y- j( m
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if 4>5  4 is the fake one
; n. @( I- u9 z; m2 M) h2 |) u3 Mand so on......................

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問題第二步
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: x& g( {9 m& ~Weight 1:  1-6> 7-12# C# @% E5 b: `8 w8 M/ d5 e
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6) e4 ~6 q5 V' ^# S2 \; d- J& z& r3 q& X

8 s# t" n; W- o4 B你第三步点去搵 7-12 边一粒???
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問題第三步% x' d3 J7 B* `+ x3 E, t" S( S# j& f
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Weight 1:  1-6> 7-12  K2 c6 S5 K+ t1 E5 j6 I( k% W! K; b

/ k7 t7 k9 `3 A( h9 s5 w# jWeight 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