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# P5 Z, o) ]* L7 M5 R2 _5 f0 s
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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)。& f0 N6 w- a3 G. L9 v1 m
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？』2 x* G2 X3 N  M$ t4 S. O6 I

: d# O/ ]; e! Y注意:
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  I- U) I$ f8 H1. 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! ?; t. j, L4 R& E* d
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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! E5 V. Z2 K; ?! R# v; W

) P- _( V0 _+ C8 R; ~0 e$ n[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
3 [( H3 `# ]6 X  L相信e條題目都有吾少人玩...

4 }6 d& J5 W' o" C我以前畫左個chart去答,  [! ~$ y; L0 @' `
等我搵下仲在吾在9 a% [$ ]" J6 F5 X) h

) q. H. }# S. x, ]# L, Q當日用左37分鐘答１２粒波子，差７分鐘才合格。
: T, B9 X* _" u3 S7 }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,
" a5 q$ m* f+ V/ S0 z等我搵下...

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3 x3 l/ |. l2 p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:
' q& `4 s8 h) |1 j唔識隱藏...已經諗到..

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' h/ a  A6 R7 n& W3 c: xsor !!!....e加改左
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7 e5 X* f! }! J' _) c3 v' a9 u1 n5 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
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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:6 x# L; M: d3 Q$ x# ?/ Y. Z+ Z
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./ z8 J) u; O" Y5 I/ Q

+ D/ N4 l; c4 ?; lThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:3 k8 f6 L* K4 W

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7 l' l/ P. b8 }  a* e& DPlayPlay, Let me know later who has the right answer and I will add points accordingly.4 u+ o* P( R9 Q4 \8 D/ u

9 ~2 F- ?& a0 I( _Thanks

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1 x- `; c6 B* F% |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
6 I3 o. ?2 z: Bif 1-6 = 7-12     13 is fake
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if not 3 |7 H% V$ n9 |: h( K0 M7 A" G+ Z8 t% c

3 ^, w( _' S3 A% h0 tWeight the 2 time
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3 |( v1 z2 w& U5 Y& tSuppose 1-6> 7-12
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8 K1 r2 H5 V  [& B- o: @" k5 i, N1-3 vs 4-6 3 X& i0 f9 J0 o& n

: K) p& ]7 V3 y) nThen Weight the Third- F7 M1 i$ R! ~/ ~, ]! {9 d# B, x
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. y% I1 h% v3 C4 f4 l8 kSuppose 4-6 > 1-3
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Just like the first Step
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. ^/ j. M3 L- [" p" R6 z4 vs 5 " c' g& M2 V" Z( \: }

* Z5 m9 N% {% n' J7 c" a/ b: Yif 4=5 6 is the fake one
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if 4>5  4 is the fake one
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6 [$ _2 _. g+ [2 Cand so on......................

hello1997

分3組4隻波子秤
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' _9 E; b- s9 v0 X' iGroup A: 1,2,3,4
$ N: W. c: U7 A$ x' M- A# ?' }9 `Group B: 5,6,7,8
* k  b1 K6 z! K, l$ D0 aGroup C: 9,10,11,12
, v$ N5 X* x2 i  dGroup D: 13
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/ w0 V! _  {+ M" g  o+ T5 j, K7 @Round 1- N  ~4 D. ]0 ^3 J6 ~
Group A vs Group B
- h$ {0 d4 O! S5 m如A and B一樣, 即較輕一粒在Group C or D
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9 M7 f& ?( C' h  uRound 26 F0 V& V# F$ @0 K1 m" h0 `
再在Group C拆成:2 b% j; s0 J/ b! H
Group Ca: 9,10
. z+ h5 A* G4 V: k& P- j% MGroup Cb: 11,12
) C" g1 G+ x! ?然後再秤, 如一樣, 即13為較輕一粒.0 h1 a$ x- ]3 k, }. v- _
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如不同, 即較輕一組有一粒較輕波子在其中,
: u* r2 T6 M1 G& y. {要再秤, Round 3, 之後便知答案.# I% a/ J! U; R! J$ t. f

) J; g3 E5 r( ve.g. #1 假設10為較輕的一粒+ L5 E) H' n& z! l, k& ]
Round 1  c* L1 t8 d: Y2 o
1,2,3,4 vs 5,6,7,8 = equal
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! d" P: o& h+ B: [! V* e& XRound 20 y; V0 p. t, R+ i8 u
9,10 vs 11,12 = 9,10 < 11,12
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Round 33 j  N4 O3 [! L3 ~3 d
9 vs 10 = 9 > 10
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7 J. l( X; X) S+ |The answer is 10.
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e.g. #2 假設7為較輕的一粒) Z" U2 D7 p8 K' k& e1 i, ~
Round 1
7 V! _7 _/ [7 O! E6 n3 V1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8" i" A* z4 ^' v( ~8 Z+ j
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Round 22 `; v- p, w6 v* f2 i
5,6 vs 7,8 = 5,6 > 7,8
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Round 3
9 C8 d  u  N' M: n5 }# W$ G7 vs 8 = 7 < 8+ W# C" R8 Y9 I+ s) b6 n& J
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The answer is 7.1 N* j1 W# y5 h5 z; i; n+ D! Q( F
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e.g. #3 假設13為較輕的一粒4 Z% k* U" l& V3 o. q; B
Round 1
* z) ?3 ]1 ]& E, |* ~( K1,2,3,4 vs 5,6,7,8 = equal7 l# W0 Y) z6 S- X: n
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Round 29 M7 J1 L9 i& Z& I3 G( x
9,10 vs 11,12 = equal
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No Round 3- o& i/ T  `" _! `/ U

* d9 s. V7 _/ h9 {" tThe answer is 13.4 |: [5 L# p- C1 t8 h+ X/ k

4 t2 B+ {' B5 q! D/ E, I2 p唔知我答得正唔正確呢?!
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  j/ x6 L1 D& y* }- @[ 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
& m  s: _" R" D" v# Nif 1-6 = 7-12     13 is fake
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if not 6 @2 f" ]) n( Z8 m8 s& N
+ a" n+ \6 D; v* P4 Y" [/ V/ u; b5 T
Weight the 2 time ; C* i. Z7 h/ C' X* ^
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Suppose 1-6> 7-12
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1 O/ ~2 W: [( f" w8 l- W1-3 vs 4-6
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Then Weight the Third
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Suppose 4-6 > 1-3
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3 ^( d4 }3 s9 e5 S+ X8 EJust like the first Step! c- R/ C) ?, \3 k0 @$ W0 m
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4 vs 5 9 ]' ]4 s1 E: Q7 [

" q; h7 J% s: Zif 4=5 6 is the fake one
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; t$ B5 Y* F1 F' U( i; U8 Dif 4>5  4 is the fake one ( x5 E( V6 g$ ?3 K- I/ N
and so on......................

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, W# `. _* b6 \6 V! S  p# e4 W問題第二步
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Weight 1:  1-6> 7-12: d0 a3 ~" F3 {% X, _4 w
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6, J8 Y% _. G4 Y8 r

: H; z# F+ ^' a5 s& I你第三步点去搵 7-12 边一粒???% S/ G: ]1 t6 _/ z

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問題第三步
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; `: L) F( h3 V2 l7 a( {Weight 1:  1-6> 7-12" h, w. w* I1 U
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Weight 2:  4-6 > 1-3 4 w/ q/ w8 x# o
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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