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1 I; ]5 V5 ^; \4 T$ g

$ |7 [0 w/ A: `. N7 {4 n' _$ A『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 u8 K# R3 F  j# 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？』  {5 d) z3 i) n; v7 \* E' g8 Y8 ]( S

  W1 ~1 l5 i3 s$ E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, Q9 c! a% R0 w3 K. ?+ U6 o
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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) n- `9 z& K- M. q, J- v+ z- ^

: `- V& X8 T* S9 l& R[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:+ R7 [% U# R2 C( Y# B
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,
0 R0 i5 l9 L, ^- D2 g. ^7 n等我搵下仲在吾在+ t, f9 A8 h% T5 }5 l6 A) }- Y) b; v

: R1 s% t/ u4 v& K當日用左37分鐘答１２粒波子，差７分鐘才合格。8 Y$ f2 R, A5 A3 J, `* A& {- V" C( i
13.........
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4 J9 ^3 Y( W& Z$ o3 ]/ p/ g* \0 h[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:% I2 }  w9 G9 y2 e4 ~6 B
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我以前畫左個chart去答,* _1 C. k& n5 e( G: h0 i
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:+ O1 K1 I4 i% c$ t0 f1 V4 u0 H, J
唔識隱藏...已經諗到..

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sor !!!....e加改左" w8 G" w  `/ U+ t4 {
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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% }( B$ K: L: W) j* g

/ V: f5 P: q9 u8 G( O$ ?[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
  e+ M4 Z  H" Q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.# [8 [6 \" j" e% h5 H1 ~

1 m6 G9 V5 N! ?8 J# |8 q, ZThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:* K2 @2 t0 j6 F/ X: i+ N% z

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.
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* W5 o7 z/ b3 R( k5 z7 AThanks

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! N9 M' l1 |7 n9 }' G9 ]9 ?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
( S9 n! c3 M+ K( `if 1-6 = 7-12     13 is fake
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if not 3 n& U1 w# f6 q" [2 f

, q# w# j/ G0 ^$ L7 @Weight the 2 time % }  A* O0 z& S* D, t. z- W$ ?& T8 N
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Suppose 1-6> 7-12" I1 H4 R. ~- @+ l/ Y/ h5 @2 f7 Q
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1-3 vs 4-6
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$ i0 I& @4 x7 P' w. `8 l3 S1 KThen Weight the Third
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0 x6 \3 X0 Q$ PSuppose 4-6 > 1-3
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& \, v! G. R- f5 V0 a6 Z3 pJust like the first Step0 P* u2 Z% t$ d4 J7 \
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4 vs 5
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if 4=5 6 is the fake one
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2 i$ I7 ]; P5 d8 fif 4>5  4 is the fake one + u. ~! {. G( E

5 y2 w* k$ ~  ^5 v2 \* t7 b) P0 b2 rand so on......................

hello1997

分3組4隻波子秤* z6 U- \, d; ?: y3 c( l3 S  z; |
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Group A: 1,2,3,4
( J# D' E6 h4 s1 IGroup B: 5,6,7,8! A; b  q/ d1 z/ a
Group C: 9,10,11,12& K$ _  }6 H; v% I: U4 |
Group D: 13: b* F/ ?" ^5 @: r9 D
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Round 1
2 b+ S4 v( t+ aGroup A vs Group B, P* T- v. B) [
如A and B一樣, 即較輕一粒在Group C or D
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Round 2
$ V9 }" h0 z/ `# p$ A再在Group C拆成:( b9 F. q# A! N) {! ?! X5 n
Group Ca: 9,10) s; Y% C/ ^* L2 N
Group Cb: 11,12; i0 [+ s5 h+ m) A- _5 l1 L
然後再秤, 如一樣, 即13為較輕一粒.4 x, A& f/ ^3 V$ h/ f2 k1 ~
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如不同, 即較輕一組有一粒較輕波子在其中, + y/ I. o1 o: y0 G, m: J% ^) F6 V
要再秤, Round 3, 之後便知答案.
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) G# [7 ?0 J/ \! d: o9 Fe.g. #1 假設10為較輕的一粒
: [: [; r6 Q8 X8 F- k, t6 ZRound 1
1 s2 E8 y/ J% O7 x" i1,2,3,4 vs 5,6,7,8 = equal/ y6 [% z, H7 F

, J0 T8 ^2 V$ _% _# `Round 24 Z7 A  H7 N7 X3 e9 F5 C0 `3 B
9,10 vs 11,12 = 9,10 < 11,12
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Round 3" k' m/ B3 x4 z/ Z9 s, y# w4 b
9 vs 10 = 9 > 102 o% g6 r' |. q; |7 z
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The answer is 10.
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& ~, P' o1 |0 m  F& B& Ze.g. #2 假設7為較輕的一粒, E. X3 {* [( w2 a7 v( Y$ N7 F
Round 1
6 e4 c0 W; c. S" C  _1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
, _; O: W* T8 R% L5,6 vs 7,8 = 5,6 > 7,8
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Round 33 N# E9 k& @+ w+ P- P
7 vs 8 = 7 < 8
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& b& c) k$ a, `3 p) u& F% V% JThe answer is 7.
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# ]+ J  p* e) o# \4 ee.g. #3 假設13為較輕的一粒
/ ?" d) l; h1 a/ mRound 1, ]) z! J+ a* Q
1,2,3,4 vs 5,6,7,8 = equal
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Round 2
" R! f; S' d( N: v9,10 vs 11,12 = equal
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1 ?, w# ~- T4 h, O0 w/ qNo Round 36 v, x5 T1 {) N8 \; C% I

2 p7 V# P) i9 F/ aThe answer is 13.- @0 P  Q/ V/ f2 B8 y, j
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唔知我答得正唔正確呢?! ; D# F; j+ h7 \& T& _- c: M

0 f+ E5 D2 @, r) U: l: a& ]6 s[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:- e. I. {- X3 V
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1-6 vs 7-126 C. x. {, p5 D. g  _0 b' |
if 1-6 = 7-12     13 is fake  u% m2 L) n) d8 a

, I% u& E$ N" lif not - p* h: b' R  z# Z" c/ N

6 G" u& N. v4 g! Y4 A2 I/ gWeight the 2 time $ T7 z' L" t* P
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third" T- B% c7 w4 `3 y. t
3.; G! v: X9 N" Z) ~: y/ {

8 a: K2 O, n) }5 I* ^Suppose 4-6 > 1-3/ g, y; L7 u' M& m

- V" ^' k6 ^* qJust like the first Step
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8 q8 f& E4 G* I6 h; }+ D3 |4 vs 5 + Y2 N; a& F$ I/ K* J0 _( S) E; b

4 {: g- K, ]0 k% ~9 l4 Yif 4=5 6 is the fake one - }4 z1 B9 n1 q$ x' x9 {
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if 4>5  4 is the fake one - ]- t3 Y. [! D: _5 h, _( S. g
and so on......................

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問題第二步1 t6 o( \' ]' P( G* X6 Q2 ~- w& x
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Weight 1:  1-6> 7-125 J1 N) T" s3 Z  ]+ K8 `/ ?
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-63 v8 d+ ^, a  {
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你第三步点去搵 7-12 边一粒???
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0 X8 W1 \' c6 U3 x( Z5 w========================================
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7 z! h+ a7 \* O# w& C問題第三步
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Weight 1:  1-6> 7-127 _- c1 P+ a+ ^3 I7 s" D4 u
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Weight 2:  4-6 > 1-3 - W! Y+ t  y. w# y, v! ]6 W

6 g' A! i9 k& W/ D- J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