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 v2 }: G0 Y8 ~" `7 j6 u1 C  V
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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)。
& Y0 w+ R$ {- G  B. Q. 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？』
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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
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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:% r$ x& X, T% B- U4 y
相信e條題目都有吾少人玩...

2 d6 t6 S! e: P$ Q2 D( e( ~我以前畫左個chart去答,) l+ C0 s" E  Q9 U4 A! ^4 C
等我搵下仲在吾在. H3 K, x& Z. g

; o) w" f$ I2 T1 E8 m: l, j2 M當日用左37分鐘答１２粒波子，差７分鐘才合格。3 J' E! Y- u" g; [0 m
13.........: v6 a0 ~0 \/ L) N/ w' m! }7 V
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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:* o0 ~& r2 q5 a3 U
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我以前畫左個chart去答,
# O# @1 S2 g2 z& e: A8 n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:  j! B# A8 Z* L! v/ _5 K
唔識隱藏...已經諗到..

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3 T' x" h) |7 ]) F; zsor !!!....e加改左/ i, a3 ^8 s1 j- [# K0 l2 L- v
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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$ J! a) W) [7 [) I[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:
3 U" i4 I; K6 K相信e條題目都有吾少人玩...

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% W$ v1 U" f' bPlayPlay, Let me know later who has the right answer and I will add points accordingly.* ~. E* h* u* B) u9 R9 F9 j$ g
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Thanks

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.
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$ |! Z. x3 X5 {2 G% FThanks

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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

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1-6 vs 7-125 g0 B, {3 m0 [
if 1-6 = 7-12     13 is fake
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if not
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6 k* Z- _& H/ ~' I6 w$ g: dWeight the 2 time
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Suppose 1-6> 7-12
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3 f, k* A- c5 F* R7 U% d1-3 vs 4-6
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Then Weight the Third0 l% ^1 a; s  z4 [  \
3.
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9 s# ?% ?% s1 F6 qSuppose 4-6 > 1-3
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Just like the first Step
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" a4 ?* M* Q0 j2 P; d0 m; l4 vs 5 * Q) E5 X5 O/ m3 D) A& K
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if 4=5 6 is the fake one $ q9 k) r* B! n1 Z
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if 4>5  4 is the fake one 4 U. \4 Z  O8 y. A& j; B8 {& D
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and so on......................

hello1997

分3組4隻波子秤
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Group A: 1,2,3,4
- q: P* V3 R' p: k  E- n- l9 HGroup B: 5,6,7,84 _, Z& u! Z/ k$ r% V( R3 }# j
Group C: 9,10,11,12' g: Z5 N, y% _6 Q
Group D: 138 x% Z" m9 W7 R5 g; S. B

! H3 e3 N3 u' ]4 r8 X3 \Round 1; v0 F6 w/ _+ ]+ f
Group A vs Group B
: b8 [# _0 l+ }6 u7 B+ o; d如A and B一樣, 即較輕一粒在Group C or D
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$ n; A  ]$ J+ c# v, ?2 |Round 20 Q  l" @5 @3 h7 r) u- @
再在Group C拆成:6 b9 _) E" L$ J; g% \0 T; ]' u
Group Ca: 9,10
( g7 Y. J  q( _0 m* @+ G- tGroup Cb: 11,125 u5 P* T# D5 s* U5 ~: K
然後再秤, 如一樣, 即13為較輕一粒.
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& U! o  A% B8 B5 b- A6 X  o- V如不同, 即較輕一組有一粒較輕波子在其中,
& f/ t0 h) U/ x  s要再秤, Round 3, 之後便知答案.
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. n$ g$ ~. ]. }9 i' R- \1 U+ `e.g. #1 假設10為較輕的一粒
4 P2 @5 D5 o3 Y: o9 ?Round 1# i1 n9 M! ^& w0 K
1,2,3,4 vs 5,6,7,8 = equal3 C5 g+ j- g' p

: Y8 ~* D- ?. k/ n* y- gRound 2
- f% r% d/ N) @( ], Z. ]9,10 vs 11,12 = 9,10 < 11,12* f- {. x, k4 E1 G* [% F

. M6 D4 @5 R( x) E6 M  jRound 38 H( Z3 P# a5 h! ^" S' L
9 vs 10 = 9 > 10
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The answer is 10.6 W0 T% r8 H. G2 O
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e.g. #2 假設7為較輕的一粒! @" X  a; f( e( O1 j. L9 d0 w5 s8 W
Round 14 [8 w- G! v+ _7 O& A1 C
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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9 n- {) B  H2 X3 kRound 2
4 j; }! @+ Q2 y8 Q0 J8 m5,6 vs 7,8 = 5,6 > 7,8
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9 L% v( z9 R1 b% k1 v! L- K! \Round 3# D' c/ Y1 h5 J" C+ N2 v7 c9 i
7 vs 8 = 7 < 8
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The answer is 7.
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e.g. #3 假設13為較輕的一粒% s. T8 M" V0 M
Round 14 h; X, @$ R8 \
1,2,3,4 vs 5,6,7,8 = equal1 n3 G. T$ Q# \! |: r3 J4 [4 U
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Round 2
% @0 w' j- G- h( c0 Q& z1 }9,10 vs 11,12 = equal0 R0 }( U: T, A: B6 C& l

% Q% ?  ~2 {# s& L6 l' j  W' n0 i+ sNo Round 3
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The answer is 13.2 |2 ?7 A& Z- N/ |
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唔知我答得正唔正確呢?! ( s4 `) Y4 g4 \) o; D1 F
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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 B, v1 C! B3 f
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1-6 vs 7-12
( n+ `4 X: G7 X0 W2 V( `- @if 1-6 = 7-12     13 is fake. X/ e  x/ d3 y
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if not ! W, B# s% v  i: m6 r% M+ Q+ n

& w+ v1 D+ p) J; U# V) qWeight the 2 time
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Suppose 1-6> 7-124 o, L! e( N. \6 K5 d) l

# D. A: X1 [0 ]: L  a1-3 vs 4-6 & ~; T8 H" m/ e7 ^% H' z  h( B

4 M, Q3 |$ r" O+ `" I2 MThen Weight the Third
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Suppose 4-6 > 1-32 i% O& i: i# f- X% o6 l, M2 c

$ C2 v0 {# B4 CJust like the first Step
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+ h: [9 Y" m9 R, ~8 J4 vs 5 " O/ c# B+ q" Y. r3 A5 c& `3 r7 j

" ]3 O* H" a3 E' C. Vif 4=5 6 is the fake one
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if 4>5  4 is the fake one
" w. |# Z4 L4 y8 \7 c0 @9 P  Zand so on......................

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& H( ~% U, _+ X+ N4 L. k4 i問題第二步
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Weight 1:  1-6> 7-12
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* ]8 ^5 F- b# ~2 W' [( C, S; UWeight 2:  1-3 vs 4-6 , if 1-3 = 4-60 y+ R8 [+ q& {$ O2 G, \
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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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5 t' W4 X. d+ ZWeight 2:  4-6 > 1-3
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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