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7 r6 |% G( R) W% K& r

6 {# C; g4 P5 ^! E* p* t& z' q7 r% k『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)。
2 w( @0 M' ?3 i. X1 }+ 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？』
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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1 X9 N4 b: [, }# c/ q) a

0 y$ `1 F$ \3 Q2 ?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  Y) d' X+ B2 M, M7 w

! ]+ z' h8 A+ v2 z. g/ D2 ^[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
0 M/ w0 ?9 C& S3 c' `" ?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,, u2 F/ R* t4 s
等我搵下仲在吾在
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
4 I: ]5 ~2 N3 J; t7 A4 o3 y6 T3 R13........., ]; T) X2 |' x4 p0 e+ }& Y, g/ g) w
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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:  |9 B: D0 y0 R4 Z

2 P8 X  D( a& b* f2 y我以前畫左個chart去答,
. e9 s) o- H, f- V1 f" e# n等我搵下...

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3 R$ n- d3 w/ A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:9 ?2 |8 Y* s; f4 l* j. o- x
唔識隱藏...已經諗到..

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sor !!!....e加改左
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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
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; l  }/ n( X/ y* h  X% t0 ][ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
, N/ U# H1 \9 J4 o1 w相信e條題目都有吾少人玩...

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1 K' ~5 K. X; ]0 O* o. e9 APlayPlay, Let me know later who has the right answer and I will add points accordingly.! H1 F! p1 ]5 i% ]6 c

- g7 v2 ]1 m2 q1 ZThanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:" B- m% Y6 \& M( \3 s' @

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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

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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.
2 J0 Q8 |* ]& z& h1-6 vs 7-12
7 Y; T4 s/ t7 f, Q. U  I) L8 Iif 1-6 = 7-12     13 is fake
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3 Y; V- w) D: ?7 oWeight the 2 time 6 S8 s$ g( a" t" C4 C' J
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Suppose 1-6> 7-12* R! n8 [' |$ I

( {' x. v  \: _0 X; w9 k3 b5 L6 E1-3 vs 4-6
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Then Weight the Third2 C7 Q( j- Q- ?& l2 i; S
3.
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Suppose 4-6 > 1-3
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  n# |% Q" {" R- RJust like the first Step
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, n- z! J4 P7 _. s4 vs 5
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if 4=5 6 is the fake one 4 k$ ~4 _" R* I

' @( J9 o+ L: L$ R( c. h4 `+ ~# vif 4>5  4 is the fake one 4 @! I; d; o2 q) X4 h6 L

9 W0 X! G7 v0 O5 {0 T! D1 u) ?and so on......................

hello1997

分3組4隻波子秤( W1 k5 p/ {* x4 ?% @- I
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Group A: 1,2,3,4
$ F# N5 J7 y1 _: y1 b9 BGroup B: 5,6,7,8
6 ]. p# f. U! H* V+ U, f5 W( NGroup C: 9,10,11,12
( Y- m$ J2 ]8 t) sGroup D: 13/ z: B4 g0 k9 b! l( K) _* w' ?; y5 `9 ?

* S' ~6 X( I# e& P$ sRound 1; ?: M7 x0 o% h
Group A vs Group B
" m1 I3 ^; ~4 i# H: s如A and B一樣, 即較輕一粒在Group C or D/ E) k8 ]/ M6 l% i

- y7 S* y  b& @+ z4 h. gRound 2
' E6 E/ K. ]2 h5 d再在Group C拆成:! J6 v8 w. \) V: p- A, ]
Group Ca: 9,10
9 Y8 X; r. U: X1 Q9 y& nGroup Cb: 11,12
; \3 d8 j3 U$ V* F- i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, ' D" k$ k# @' \$ u. J$ W
要再秤, Round 3, 之後便知答案.
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4 [7 A' q3 `! u- `" K2 _e.g. #1 假設10為較輕的一粒* i& z( j7 K) m  L, H$ m
Round 1
4 H! ]2 n; |) H9 y: g  D1,2,3,4 vs 5,6,7,8 = equal
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Round 2/ J: _) J  v/ L* w6 |. U% \- a
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
8 H; R3 i! B/ \0 T  D9 vs 10 = 9 > 10+ a8 q* N" M" z. r9 ]9 p

% [. ], G6 G& f; X9 {6 s$ c8 m8 yThe answer is 10.
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- y4 m4 X, _8 S9 e! ^4 m8 ~e.g. #2 假設7為較輕的一粒
" q6 |) f: \3 \, u) H8 V: \+ DRound 1+ U4 m# c! b$ o6 K) d  ?
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8" y: g1 {" t0 _
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Round 29 ?3 H* _  `1 x: Z% w
5,6 vs 7,8 = 5,6 > 7,8
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) b) X" i. o# o% M6 g. JRound 3
1 N: c. S3 N/ Q- I8 Y7 vs 8 = 7 < 8
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& l$ ]) j1 M% V4 y$ pThe answer is 7.
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e.g. #3 假設13為較輕的一粒
3 ]8 R/ x. f; [" u# h9 \Round 10 }2 z% `+ I. |" i
1,2,3,4 vs 5,6,7,8 = equal8 f/ y. ~' V1 J, j% Q% ~7 ?
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Round 29 t  c* {4 \4 K2 h! |
9,10 vs 11,12 = equal8 L/ u. B& J; j+ A9 J$ F
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No Round 34 x' ^+ v1 k2 z, ]" o

4 c  h, F, O  u& y' G5 uThe answer is 13.: G. A) N" h: A! |, H

& m" j% ~7 r- R1 F. h% w# D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:, Y6 `) Q0 l' ~0 n
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1-6 vs 7-12& A; e( i! z1 j( K. m: y0 J
if 1-6 = 7-12     13 is fake, a6 e: J# s0 c! q0 e- Y

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Weight the 2 time - d0 L* C9 ^- B0 q9 z0 A8 u
  [( t0 j2 E8 \+ U$ B
Suppose 1-6> 7-12( ]. `6 o/ l9 w; |

$ o  n: m6 _7 D* A1-3 vs 4-6
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, R, r7 P6 ]# |' ^Then Weight the Third) ^8 l' _" N  d: K# u
3.
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9 f  K! e# V2 [9 a, R, k/ SSuppose 4-6 > 1-38 q; i. o; w: l1 M( o

* u" U! O# Y3 h/ Z3 z5 BJust like the first Step/ h" O3 @. X0 ~# g0 l
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4 vs 5 : k8 a+ u* h/ e" I3 |% L1 @, r
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if 4=5 6 is the fake one 1 ~0 ?, U% {! }0 u5 e3 \
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if 4>5  4 is the fake one 0 g# `% s) p; r9 u9 X; H
and so on......................

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問題第二步+ C; m1 t' c  H3 u
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Weight 1:  1-6> 7-12; z3 q$ Q; [* Y& ]8 `
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-69 Y3 U" Z3 p' K0 c3 p% A
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你第三步点去搵 7-12 边一粒???7 l* b! ]& O' g6 Y

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4 a2 z3 Y1 @- s$ [) }! r! |" E問題第三步
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- W6 Z$ V3 @5 S0 X& [( p4 jWeight 1:  1-6> 7-121 o3 x# h9 M( U1 U" l" S+ }

& X: p0 w$ e/ f9 ?! m1 fWeight 2:  4-6 > 1-3
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/ m& w; m" S5 l/ c3 E% U; @( _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