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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9 q3 I" J$ J$ z- [『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- o5 a7 e& I) R4 \" c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？』' p/ O) K0 f* Q, q2 |

2 ?- J9 S: G+ Q8 \1 w) m2 X/ D注意: , K% y- Q: G( V# T5 y/ V
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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
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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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[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
! j1 {) y- P* q1 ^1 D" S相信e條題目都有吾少人玩...

0 A  W2 K# q6 \3 g5 a0 y我以前畫左個chart去答,4 r) H# t5 t. F/ j. V3 I# M
等我搵下仲在吾在7 v. y  y7 S& G
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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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. J7 X' t+ y9 I$ N8 d5 k  E: }[ 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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$ J: r3 x0 j" R我以前畫左個chart去答,
( e" ]9 m* e: T) B- D6 V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:
& u7 @7 [1 p5 L: M0 {. A$ p6 S唔識隱藏...已經諗到..

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5 D/ k/ @( R9 A) K8 nsor !!!....e加改左' Z, ~+ H. C3 t# Z  f1 D, q' u& m9 T

- G" v, }8 E2 x* o2. 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* \& T- o$ q. Y# J
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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:
: L# K  ?, F) 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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PlayPlay, Let me know later who has the right answer and I will add points accordingly.* [; c% M: i- L" d2 Q* s
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Thanks

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, \$ M* h5 D2 J8 `, _# {4 l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& E# k3 s/ V; d0 d& W
if 1-6 = 7-12     13 is fake
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Weight the 2 time & F, t  I4 r4 ~% T, h9 r5 r/ c4 \

% {0 Y+ t5 d. X) O* ^Suppose 1-6> 7-12
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, N" [) a$ b( K8 r+ T0 T( h) ?1-3 vs 4-6 8 ]- T4 _0 u/ @
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Then Weight the Third+ I' C' s8 B# Y7 g
3.
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+ N) k$ \9 t3 VSuppose 4-6 > 1-36 _$ ^/ m& q' T2 y
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Just like the first Step% }, _& V) F" V1 ^3 S
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4 vs 5
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+ s0 X/ M7 ]7 ^1 ]% U. _% e4 ]. Wif 4=5 6 is the fake one 6 w7 g0 X" F* G! u6 J6 w
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if 4>5  4 is the fake one
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" u- v3 y0 @- s: M8 c& P2 j/ b, _- tand so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
+ w9 k4 m; i3 ZGroup B: 5,6,7,8( G( ]4 \1 a0 W# j# g6 N# v, }
Group C: 9,10,11,12' X+ k( Y  \5 m
Group D: 13" }2 g; r5 X0 V8 |' ^3 w2 Z

- |/ }2 K$ ^% u5 jRound 1
4 N. G# P& ^1 r. P& K; w. EGroup A vs Group B+ ~+ Y+ b$ V; u% q  K1 q
如A and B一樣, 即較輕一粒在Group C or D
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& V9 r& w( j. ]4 }& c5 U8 |2 DRound 2
1 n% h: t; A' q' f8 {2 A3 ?再在Group C拆成:9 u0 c) e. N, d( ]2 P4 A: f
Group Ca: 9,10
" u9 U" V5 }" C1 U: e) g& |Group Cb: 11,12
& _: c) i+ Y1 E然後再秤, 如一樣, 即13為較輕一粒.* p* ~' u# I4 B$ n3 `5 O" ]/ r
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如不同, 即較輕一組有一粒較輕波子在其中, ! S) g' P# r: T  E) c! R7 {
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒2 U  V+ x5 y# W- i1 R
Round 1
' j1 Y) ~  x" i0 I) ]1,2,3,4 vs 5,6,7,8 = equal
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6 x3 m5 ^5 T$ _* TRound 2% n( D0 }6 O: V* t& q
9,10 vs 11,12 = 9,10 < 11,12
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$ }) z  `* b1 x, `, q6 I3 h5 {Round 3
3 m, q5 u, ~8 _. y2 f9 vs 10 = 9 > 10
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  Z) p- B2 R1 p: x3 e9 d& I& r/ J9 `7 GThe answer is 10.$ K4 L# S* z% X& I3 _9 Q
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e.g. #2 假設7為較輕的一粒
- B1 T- c0 f6 f; B' wRound 1
! M  }8 F( m% e2 ?# D3 B% V1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,86 q* j# @" x: c) P
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Round 2
4 Q6 W, T6 e5 F' g- \5,6 vs 7,8 = 5,6 > 7,8  \, x! V2 Q# j" `  s& i

/ b) L" u/ }9 J2 h# [2 K5 Q5 QRound 32 V6 l! j/ _5 F- P8 D, }0 o# @+ ~8 W
7 vs 8 = 7 < 83 F1 q9 Y& q( I! O1 ]" r5 {9 k
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The answer is 7.0 {6 ~1 Y4 j; @* D
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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 = equal! K2 w( D  v8 E0 i

4 I8 \" k& u8 S3 U& ~9 TRound 2  ^& T, C: B* ^- K
9,10 vs 11,12 = equal
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7 ~* _& {) k. z! f9 VNo Round 3
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The answer is 13.! E, ?: N, S. f
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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:* l1 Z2 X' X! {1 Z3 e! h
1.
6 t7 C" l/ S/ m1 l7 g; x- ^1-6 vs 7-12, E. }7 B, d0 g1 A" l& y+ V
if 1-6 = 7-12     13 is fake! Q8 {' i8 j8 C, U6 A

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1 [4 K2 S( `! e( ]! MWeight the 2 time " b$ \/ r8 t) Z3 d* h8 T/ V
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Suppose 1-6> 7-12
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Then Weight the Third$ _5 W& b5 B: G0 N/ |7 }4 G
3.
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& b3 N; h" _, q& CSuppose 4-6 > 1-3
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Just like the first Step
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4 vs 5
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if 4=5 6 is the fake one
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; v- M4 Z3 s$ d( L- F" U& uif 4>5  4 is the fake one
/ `* B+ M+ A$ A& Aand so on......................

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問題第二步& l% Y! ~2 Q- i" l

: D& [0 U2 d5 \+ C: P6 z0 I  eWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6& f0 @# T. @" E  @7 L
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你第三步点去搵 7-12 边一粒???1 Q( h  p9 `  y& r

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問題第三步
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Weight 1:  1-6> 7-125 J+ @, X, i" ?' T/ h

: w5 Q& {7 p0 W4 z6 a+ M& S# cWeight 2:  4-6 > 1-3 & l1 W, a4 j7 J( Y+ R
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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