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)。
1 e% l- G) a  q- A- Q9 t; K1 z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: 4 \  R7 u) ~# _
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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0 w" L. d6 t3 e
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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:+ u1 Z7 n$ R+ m9 k8 Z  l0 g
相信e條題目都有吾少人玩...

. `; e5 M2 Y) }; t# G) {我以前畫左個chart去答,
% N! I% ~' x8 @# t, [% o6 }" p等我搵下仲在吾在. ?9 a* F3 p: E9 k2 ~) W

7 O: d! c- u; v6 ^* W6 i& b當日用左37分鐘答１２粒波子，差７分鐘才合格。
" z$ `+ l' \+ p4 p13.........7 N- w! o- f; ?& P* J
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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:; X3 k! g9 G7 H; q: w) p0 p; s
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我以前畫左個chart去答,
9 J0 T* p8 K  a& }* f! X等我搵下...

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) p' _$ L" C% }9 ^' C' d  Q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:1 Z4 s) {; H: T1 t
唔識隱藏...已經諗到..

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sor !!!....e加改左
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' k, X9 S8 l* \, a% f. {' R/ \* W! b; 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
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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:. Y. v  ]- M/ c" @9 h
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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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." p7 b: W$ \5 j1 h  H5 x- S7 X

/ b  z& N9 b  U4 n. aThanks

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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.
  Z3 E+ E. p; s- ^$ u1-6 vs 7-12
! n! ^( x: _" p6 D' v: x/ Jif 1-6 = 7-12     13 is fake7 g6 \$ y9 E* V1 D

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  V' M7 {; r  R* g* V- YWeight the 2 time
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, U; `0 R1 ]8 D: y; `% DSuppose 1-6> 7-124 R# U+ x" o4 T+ k

) W: u8 X# @& ~6 o1-3 vs 4-6 * J/ ?8 J  z1 M% n

4 d+ [; H/ d# j  f$ gThen Weight the Third
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! u% o" P6 }. _: N1 @) A/ p2 dSuppose 4-6 > 1-3, d* k) L$ T- _, k2 {( u) i/ M
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Just like the first Step
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4 vs 5
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6 l# H* u( K6 X5 Vif 4=5 6 is the fake one
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if 4>5  4 is the fake one ' X3 w/ E: C) h$ Z7 j

- _) e4 {/ @  i  w, oand so on......................

hello1997

分3組4隻波子秤
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( I4 K: D% f+ _2 v% uGroup A: 1,2,3,4
) b; g! S, H" a3 [: d% yGroup B: 5,6,7,8, }! }  X: [: }; G! S/ m6 O
Group C: 9,10,11,12
" a) r3 S. @$ l6 bGroup D: 135 o, C$ }& L: ~

: X" W& W4 `: R5 H! [/ M* `Round 1
! C, S* }+ ?# ?8 _6 A& x- kGroup A vs Group B
" {5 e3 t( H% \7 S8 m! k如A and B一樣, 即較輕一粒在Group C or D
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5 S8 X# e( Q( x' }Round 2
" Q" I( [5 j* R) g再在Group C拆成:
3 F- Z1 J/ W. R5 C3 ~3 E9 r* g5 S4 g( ^Group Ca: 9,10
# [& G( h$ R1 I/ g3 BGroup Cb: 11,12- u* U8 S! A9 ?4 h) ?9 v
然後再秤, 如一樣, 即13為較輕一粒.' K3 p8 H& w. S: w: Z8 C

* t; s  f; u- P  f如不同, 即較輕一組有一粒較輕波子在其中, ! l$ s: x/ z( U& w* r* U/ m+ W
要再秤, Round 3, 之後便知答案.2 ^6 L4 o, z/ u, P+ k
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e.g. #1 假設10為較輕的一粒
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0 @9 ^) G& j& ~  V# J1,2,3,4 vs 5,6,7,8 = equal9 Q! @( D  ^0 k5 B, o
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Round 2, Y5 W/ `9 I9 A3 w( [( a& z  M# b
9,10 vs 11,12 = 9,10 < 11,12
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Round 3
9 f' i& y1 |% W+ [* T9 R# R9 vs 10 = 9 > 102 c  U2 v1 q8 F3 J# `8 x) G

1 z& n5 z" m  x, E2 a3 s# c$ bThe answer is 10.
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& o" |1 H  r9 Xe.g. #2 假設7為較輕的一粒
/ i* I  z6 e& `3 d) `+ n3 A! M3 kRound 1
5 H! U2 Q2 P  `" r, q1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,88 Y+ s3 i2 z! ?

0 ]6 Z% K" C6 j" x  l1 U: ^Round 2$ Y5 t9 d3 ~) @5 h: R
5,6 vs 7,8 = 5,6 > 7,8- l" x0 ~  j  `  X# c2 i
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Round 3
. U& x: J" a! u' @7 vs 8 = 7 < 8
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The answer is 7.
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4 }6 S3 n# V% Q4 ue.g. #3 假設13為較輕的一粒' U  G# z8 q$ W2 R5 I4 z
Round 1
( @% z  H) ]- g/ M* `# z+ K1 v5 g1,2,3,4 vs 5,6,7,8 = equal$ O( Z9 |$ R. E: U/ U7 p

% f' I6 `/ G) C0 yRound 2
, i/ b" [: M* P6 W5 F, X, F9,10 vs 11,12 = equal
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No Round 3; X: l* `" x+ Y, {2 L, \/ q; H

2 _3 S3 `' a) \, E- w# aThe answer is 13.% Q5 m7 h  [0 H  L
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唔知我答得正唔正確呢?!
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8 d3 Z: g9 a6 D1 G, x[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:, q6 f) t  Z' o* ^( w7 t
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1-6 vs 7-12
8 o+ Q+ H4 W; u- T, ^4 [1 Jif 1-6 = 7-12     13 is fake
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; n4 j0 U6 B- Rif not
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! m0 A. _) U" r  j8 }3 DWeight the 2 time
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Suppose 1-6> 7-12& p/ n) l' Z: H3 C" z3 j5 j

4 _3 o- I% e' m1 J0 S# Y1-3 vs 4-6 : j$ [: b. m* m& ^& n8 U
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Then Weight the Third% O6 H* h7 B7 e+ h
3.
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Suppose 4-6 > 1-30 A  T- k* m9 v
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Just like the first Step
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4 vs 5 $ D. L+ d, _: M6 a

# l; ~, |* _/ R- c9 |, Hif 4=5 6 is the fake one 1 h0 h) _1 g9 l8 N6 j( a0 K

# V1 [# H7 ]" r) `5 o! @if 4>5  4 is the fake one 1 G" ?$ {" [0 W" y7 U* C
and so on......................

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) t2 ?3 V3 g- k問題第二步
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Weight 1:  1-6> 7-129 H) C1 y) c  j( U
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6% r9 m+ R1 E7 F
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你第三步点去搵 7-12 边一粒???
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問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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  ^+ H+ d/ g1 U# I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