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6 N0 E' h) q" `5 ~
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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)。
/ a, b% r2 ?; U/ C+ v) c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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8 {* V4 J' C$ |8 d$ L$ x* i1. 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" G7 s( i' F+ d. M; \* w

" P6 m  p! W; J2 P2. 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: ], ]1 w/ E+ x: o3 \) v0 n' D

0 ~; v) A5 r# Y% s% Q[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:
! V/ V; f" a' A" K$ P6 q9 d相信e條題目都有吾少人玩...

6 l7 l# o& s* t# ]4 M我以前畫左個chart去答,0 C( N# O  `- o+ a2 m
等我搵下仲在吾在
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# y$ Z6 H8 E0 n; `* V+ @- i- i當日用左37分鐘答１２粒波子，差７分鐘才合格。
4 _" q0 V1 s5 I8 T( P13.........4 x2 o# l$ k3 r( j2 u! c& h) w$ z
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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:8 a+ i6 O: w4 b( @$ b
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我以前畫左個chart去答,; n) K' n1 S) c% K- \0 f: o
等我搵下...

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) G- x! ^1 v+ |0 e" m8 @8 W4 T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:
" p7 R  s# W' v6 q9 p唔識隱藏...已經諗到..

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sor !!!....e加改左
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; |; V, x# Q5 ?: @1 I2. 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5 w9 U0 c: o* m
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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:. E# X* q* U/ b  J1 e/ d5 t
相信e條題目都有吾少人玩...

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+ F8 G; y* r' L& q1 R/ ]1 aPlayPlay, Let me know later who has the right answer and I will add points accordingly.5 D9 D5 m$ h2 R3 U

5 x2 Q  A3 [. S$ d9 G! Z: ?& ~Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:/ c5 d! x2 }% t  [

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; }9 n" x) `9 @7 rPlayPlay, Let me know later who has the right answer and I will add points accordingly." R0 I9 m, l  P8 Q
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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.
% a+ W) a# P4 i, H1-6 vs 7-12
4 v+ C: R" g7 U% M' G. \  Fif 1-6 = 7-12     13 is fake
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Weight the 2 time
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! r; _4 T" @' b3 x0 o9 xSuppose 1-6> 7-12' d0 n# ~) Z& C$ l% s

2 ?; m. W& j  v/ O; j; b* Q1-3 vs 4-6 ( D1 J6 x% X. t  Z$ G
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Then Weight the Third
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Suppose 4-6 > 1-3
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9 ?% H6 h& p" R; f+ j% l( o! qJust like the first Step, D6 Q. U/ q# S* l0 S2 a5 ]
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4 vs 5
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if 4=5 6 is the fake one 6 a! q- `8 M! G5 J- }7 H7 L. [
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if 4>5  4 is the fake one % m- R) _/ q/ w5 q- Y. f5 D

4 Z$ {4 m( T# Q% X/ N3 F# Jand so on......................

hello1997

分3組4隻波子秤/ J$ T3 b) M; `2 O

* ?3 p8 l6 x' ?- \/ n: e: QGroup A: 1,2,3,4$ t2 s  m9 A% H1 N! n' V) _
Group B: 5,6,7,8
0 c2 L8 _% F7 Y' i# H" ^Group C: 9,10,11,12/ o9 ~# g. ~2 @' d" Z/ N4 z
Group D: 13
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Round 1* k. j8 r0 n% H5 k
Group A vs Group B
7 N# z4 P/ @! m: N1 T; `( b如A and B一樣, 即較輕一粒在Group C or D% \  c( F! D, F- x3 G
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Round 2
+ Z+ {. Q3 l  g4 C6 o8 H再在Group C拆成:$ @; h9 }& p) X
Group Ca: 9,10
  S( f' X4 r' n6 U7 X# c( \Group Cb: 11,12
# f/ l9 q5 W! a, l/ v( C9 H然後再秤, 如一樣, 即13為較輕一粒.1 u* X  p5 }3 D5 _
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如不同, 即較輕一組有一粒較輕波子在其中, 8 B" G2 i& K: k5 x/ R
要再秤, Round 3, 之後便知答案.
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e.g. #1 假設10為較輕的一粒
! `8 T7 h# p% oRound 1
  O; n5 g% Z+ K$ B+ v1,2,3,4 vs 5,6,7,8 = equal9 @! d/ Q9 Q! C6 X

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9,10 vs 11,12 = 9,10 < 11,12
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Round 3
8 w; J4 F+ A. M" m9 vs 10 = 9 > 10
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The answer is 10.; K0 @3 n( P- p  S  Z
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e.g. #2 假設7為較輕的一粒
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1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8: p- b+ K$ d0 s  x* @1 N. x

7 z8 x' i0 _& i5 G2 @, a1 r( ARound 2
7 x. a2 h. y: z, R/ U5,6 vs 7,8 = 5,6 > 7,8* `! @) b8 s; h# Z7 w; I- G

4 G( g6 Y+ b! a( _8 GRound 3
& U' D3 e1 ~# l8 u7 h7 vs 8 = 7 < 8" I8 z+ ]+ R$ z+ B1 j8 I+ Q2 }' U

4 _% ]$ C/ f  @3 p: c$ r2 ?The answer is 7.  l' r6 c4 {, N* Y- q7 T4 O- y

$ \; L1 [# X! fe.g. #3 假設13為較輕的一粒0 |1 W4 a, ~# H6 ]
Round 1
1 S" {' h! g  M5 C1,2,3,4 vs 5,6,7,8 = equal
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Round 2& H6 e/ y! y, `8 R0 }" v+ \( f
9,10 vs 11,12 = equal! C" A1 s- i7 K/ M. `

6 A4 [9 g, g! fNo Round 3+ `8 I8 y+ q: T& |& E
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The answer is 13., g$ Q8 s- K+ s$ ~6 Z7 m

& C' W" f! e6 g  g; a$ D0 j; e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:% r% e( n7 W. P$ d+ R
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1-6 vs 7-12# D( }  Z" \3 U$ q# [. Q* e
if 1-6 = 7-12     13 is fake4 c6 W! M) @! |+ Y

) S  n$ a  a. b) {if not 5 }; i& z; R) d9 X& \7 O6 P

0 l& S' y7 D# n  b2 A# O3 t$ qWeight the 2 time
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Suppose 1-6> 7-12+ [  t! D3 ~7 l1 s4 @% S
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1-3 vs 4-6
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* Y3 d5 e$ W& Z( L( m1 @Then Weight the Third6 R- Z' p: g$ d
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( D7 m6 a! V% W/ b" u9 U. a, RSuppose 4-6 > 1-3
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9 I3 d6 h! J) D0 ?8 O% FJust like the first Step6 p# [/ ~0 U" w7 U+ Y5 e
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4 vs 5 . l- Y# k1 ~8 C' g& V! u3 M
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
2 g2 ^0 T% E& s. Tand so on......................

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+ @- n3 _! x7 G& r# h% [問題第二步' ?( ~' y& M. C/ G& d8 F; ?7 K5 E

3 i/ F' l7 w2 u* n, s) QWeight 1:  1-6> 7-12
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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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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  q7 y- k. A9 }( L1 \$ dWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 : i% Z% r6 I4 _, r9 A2 w! Z% \
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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