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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『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)。4 B2 ?. ]& d6 L6 R7 U8 |- q
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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注意:
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- W# W2 Y+ U7 B6 D( g; [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:* s' z& R, d$ H& |1 x
相信e條題目都有吾少人玩...

+ A3 B9 H7 H9 X7 G7 w我以前畫左個chart去答,
% F- k- N$ h1 V: C, c等我搵下仲在吾在1 k2 m% d9 T$ C2 B0 w

, _9 F' |+ S0 k7 v: j! L5 c當日用左37分鐘答１２粒波子，差７分鐘才合格。: ]( c( M" p% G! u$ \' d( {
13.........: Z3 N: \" P/ o0 u: W/ ]" J

# r8 ]7 P0 |/ k* T6 a- |[ 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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5 ?& N$ @* ^2 y* C! H0 n' A7 W我以前畫左個chart去答,$ @5 U/ g8 [7 o% h) n' e1 `
等我搵下...

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- X* y4 ~% ~( k1 h$ S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:
+ w  l( ]4 f$ ]$ L+ M& \唔識隱藏...已經諗到..

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sor !!!....e加改左9 t+ J( Q) T# ^5 q$ |
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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* R+ H. z- w) U& b* ^* @* s

0 c0 d3 w) N; F% d! D' Z- M1 c+ F+ v[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:7 t, e* T7 z* D1 c& U
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:% W$ r  I5 C) c

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( z( Q% B9 C/ {# HPlayPlay, Let me know later who has the right answer and I will add points accordingly.: K/ m9 f; r/ D

: ?8 e) q9 e# eThanks

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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.
5 J+ T( N3 i$ ?. j+ c# l1-6 vs 7-12, V- Y1 z9 F, _6 w
if 1-6 = 7-12     13 is fake
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if not
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Weight the 2 time
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Suppose 1-6> 7-12
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7 i- L  q- `9 G; F' i1-3 vs 4-6
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' o# W* h0 A* ]7 aThen Weight the Third
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. }, `6 f  @3 ^/ D3 z  GSuppose 4-6 > 1-3
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$ Q" R2 g& p$ T6 b+ i& R) m9 Q1 uJust like the first Step, s& C" p) d& q, Z. \# T3 H1 V) f; q
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4 vs 5   B! P6 V3 ~( C2 i8 Q& I% K  Q) n

* q9 k/ {# A0 y$ A9 Hif 4=5 6 is the fake one ' M' V# S. C6 J
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if 4>5  4 is the fake one % k8 @( F! F. n6 w

: J8 ~* x! D  _and so on......................

hello1997

分3組4隻波子秤* m& \, d3 N5 e1 \

* v5 I3 r" m+ d4 b+ IGroup A: 1,2,3,4: x" ^. W6 A  l# a  x
Group B: 5,6,7,8& {+ ]& M8 l' f. j0 B
Group C: 9,10,11,12/ x6 o- R3 v, V0 x) n' @
Group D: 13$ r* _% c/ p4 q) D1 @

. K- F! @% c6 C8 s# X, v+ uRound 1/ _7 q! c5 {: `) H7 K% v! r' I
Group A vs Group B
$ z0 ~" v0 k3 o( o/ i如A and B一樣, 即較輕一粒在Group C or D
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Round 22 a8 e- V- Y  ~
再在Group C拆成:
2 c6 [) U6 j$ M, N9 mGroup Ca: 9,10
& F$ i7 j6 M7 \, I8 Q7 O9 ~Group Cb: 11,12
9 B( c5 c& t/ T; l然後再秤, 如一樣, 即13為較輕一粒.6 P+ C: o- V( h$ \8 [
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如不同, 即較輕一組有一粒較輕波子在其中,
  ?3 |3 e, b6 ^4 Z  _要再秤, Round 3, 之後便知答案.- l0 j% S8 A  T
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e.g. #1 假設10為較輕的一粒
3 ~$ N- v' L( |3 Y6 aRound 1
& b  v, ?" T" E+ b1,2,3,4 vs 5,6,7,8 = equal
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) o. ]! b: a7 eRound 2: K1 ]+ g0 s& ]2 d1 S& k
9,10 vs 11,12 = 9,10 < 11,12& j3 s; K. S7 t0 R- X: I- q
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Round 3
+ X/ s. C& i: s; t9 vs 10 = 9 > 10
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$ h% ~9 _0 p, m4 Q# r% rThe answer is 10.2 y0 `1 \- n- ~+ w# }
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e.g. #2 假設7為較輕的一粒
5 l3 U( g0 z& O/ N; D( X. kRound 1, Q$ k- ^, \  W& h' k+ C+ J
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
" X6 v6 |+ N! U; a8 G5,6 vs 7,8 = 5,6 > 7,82 N0 }' x& Z  E5 o! F
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Round 3
; E! o$ \" f) o& f( a( R9 S* x! o7 vs 8 = 7 < 8
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The answer is 7.) g3 ?( g# p& ~+ Z' c. g2 x
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e.g. #3 假設13為較輕的一粒0 y3 s% s6 }/ w
Round 1
) D% N+ K  {; d3 k) z1,2,3,4 vs 5,6,7,8 = equal
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1 B9 D3 z1 \* o  K9 y5 T! v" yRound 2/ K& r& \6 y% d  @$ s
9,10 vs 11,12 = equal
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No Round 3% v3 e7 q% G* E. g/ u: k( `
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The answer is 13.5 {4 n, O8 g7 n* O7 M  F

8 y  f* ]9 M+ k. R( f7 g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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" [9 C% E! ]  J5 p' i1-6 vs 7-12! O$ e/ W7 P4 C+ g" J
if 1-6 = 7-12     13 is fake
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if not $ u, F; ?2 R0 \

! V7 H7 L; b% o+ X7 M" PWeight the 2 time + |7 C6 O7 t) [) j) T6 O0 Q5 f
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Suppose 1-6> 7-12" Z- ?3 c- C8 S7 D% c
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1-3 vs 4-6 4 c* _. I- e3 ^( a( O5 a
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Then Weight the Third
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7 q* n" f7 u1 i1 TSuppose 4-6 > 1-36 F) T: I$ c7 ~+ \! P2 E0 {
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Just like the first Step2 d' b2 E3 _+ T$ F
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4 vs 5 7 j# [+ s% c* v4 f: K
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if 4=5 6 is the fake one ) k; K6 t  R. K  b# W' B, o" p
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if 4>5  4 is the fake one
$ i- _0 s) x$ Z6 Gand so on......................

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# u( l9 u5 Q6 J8 a* f問題第二步& ?* O: F1 T6 k, \- l0 k
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Weight 1:  1-6> 7-12
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" @8 U. b5 @0 a1 y8 Y+ h, g5 hWeight 2:  1-3 vs 4-6 , if 1-3 = 4-63 C) q3 q% _; u% Y. j
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你第三步点去搵 7-12 边一粒???3 I9 m, ~3 W: N4 e2 ~* @+ d* |

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問題第三步0 w& h& u& ]/ K, Z  \* Y* n

0 J: h& F/ W  s$ ZWeight 1:  1-6> 7-12
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, J0 h( R  s. B+ ^" R0 g- l! XWeight 2:  4-6 > 1-3
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& C7 O) W* d1 v, G% b' z) S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