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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" y) t' {' k8 h『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)。
$ x& F! E$ i2 I0 ^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: / l: X- c1 F# G* `: B, k

$ c6 A1 a9 q6 G! J. e# U1. 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:* o7 O9 i5 v1 u/ F6 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,9 @4 a/ f9 a. N5 V& O! @1 U
等我搵下仲在吾在; ]4 Z3 S( R( ~( T/ {! U

) k* c/ @9 w* W% \8 u當日用左37分鐘答１２粒波子，差７分鐘才合格。
! c  n' M7 T+ R6 v# i13.........
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& i5 P9 v- l" [  F[ 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 R5 C  _" J. C
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我以前畫左個chart去答,
' X$ ?) L7 u+ |; X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:2 D2 g' {, K6 M' }+ ~
唔識隱藏...已經諗到..

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: p7 J1 }+ G) Asor !!!....e加改左
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" M; A+ c4 C8 F  k9 Y2. 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2 ?; U) _' ]4 P6 O6 ~, x% B
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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:
/ c3 n- K, R& B6 @+ O8 w4 E相信e條題目都有吾少人玩...

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% l3 M, y- D8 t5 a: b6 T3 dPlayPlay, Let me know later who has the right answer and I will add points accordingly.# F2 N+ \8 i2 j" I) `
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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:' [" Q0 g( T& O3 U7 V& [

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4 D: T) x# ~6 o0 J9 H$ n8 PPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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' w' g5 i% f; _  `8 PThanks

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; Z0 k3 T: x1 d不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.4 I4 x* G% V: F: d8 p! m! U
1-6 vs 7-12- p9 V, j% ~7 G! I* z/ {: N
if 1-6 = 7-12     13 is fake
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1 b- W/ W! o2 Mif not
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Weight the 2 time
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Suppose 1-6> 7-12
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0 P4 l( L4 z0 C0 U1-3 vs 4-6 5 @2 S9 d5 v$ @" F" c
& {& f9 h; A, f7 V/ d
Then Weight the Third
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Suppose 4-6 > 1-3
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+ F) ^2 U& w' o" _Just like the first Step' F; L% n. M6 y/ C0 b0 q- g

$ b5 u4 X0 m; K  t4 vs 5
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' q: s0 m  k! a# a, e5 aif 4=5 6 is the fake one ! Q7 D" L4 E" r" ~  ~7 A: u0 W* W; V
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if 4>5  4 is the fake one 1 q8 Y7 N: W; M1 I: x

4 \1 l; o& J' Kand so on......................

hello1997

分3組4隻波子秤, @: d) W, w# J" o$ c
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Group A: 1,2,3,44 O, |8 n$ u1 Y) H
Group B: 5,6,7,83 V7 {% V" i0 n
Group C: 9,10,11,12
3 O- ]5 g% s% g8 e- zGroup D: 13! I" f* ^5 r  G+ q
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Round 1
$ q) @9 c: j+ B7 F! b5 XGroup A vs Group B
; I7 ]/ t3 X1 [4 U如A and B一樣, 即較輕一粒在Group C or D
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Round 2: ~" K3 S* Q9 |; j( ~
再在Group C拆成:
4 `# J) S+ \* I3 HGroup Ca: 9,10/ E( l4 `  x) L( I2 J
Group Cb: 11,12( O4 W9 n6 m9 j" H( U/ [
然後再秤, 如一樣, 即13為較輕一粒.
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5 X7 B  ~7 ^  Y* u1 f; L$ ^如不同, 即較輕一組有一粒較輕波子在其中, : j, P' Z- B. p' S4 |
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# \9 h6 s, c; L8 u! m
Round 1. e7 ^  ]' X9 C# s" S  t
1,2,3,4 vs 5,6,7,8 = equal# y# W1 c4 d" v5 N  ]
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Round 2: c* n2 j* }* z  j9 k
9,10 vs 11,12 = 9,10 < 11,12* w: ~" S. c- U. C. G
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Round 36 d$ g5 Q, S/ p9 j! p
9 vs 10 = 9 > 10
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The answer is 10.
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3 h' ^4 b# a, J$ |/ g" J/ w1 pe.g. #2 假設7為較輕的一粒; s% h) l3 h: {( D
Round 1+ Z7 h% X3 {# {2 K  Y
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,82 F# |- a6 Y1 _* x% v8 ?) s* d
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Round 2
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Round 3' e9 J7 v( k% Z$ F8 x& @0 k9 u
7 vs 8 = 7 < 81 y. k! Q% }3 v& S+ T
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The answer is 7.1 A6 f  U; d# \# |6 f" ]

" g* p/ C& n5 k) I' i; ye.g. #3 假設13為較輕的一粒
: q: e. R% B6 ]* T+ k6 u1 @Round 1
# T/ l3 x# w2 N# a- f! ~8 T/ D1,2,3,4 vs 5,6,7,8 = equal! d4 `. U6 e$ M6 N7 U

! Z! o/ D% A7 @# h* F- YRound 2
% I# Z! }5 k$ u- r$ P; `9,10 vs 11,12 = equal# f, _6 a$ Z, h' n' u
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No Round 33 {* a0 p7 _9 f! e; K3 y

, N$ {$ z% j. y% |1 iThe answer is 13.! l& Y4 L2 X: R0 o2 {
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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:- G9 q' _- `; r( m3 T& H
1.
8 F5 Q' J/ d  Y& f. j' Z1-6 vs 7-12
3 G8 z- K& @& r  n! G, u7 N7 qif 1-6 = 7-12     13 is fake
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, T' o8 t4 K1 q  Q3 B; \if not
/ g: b8 g4 ]! e1 n6 G0 K( W, _4 r% `8 l! T+ Y
Weight the 2 time
4 S6 V/ ]5 Y! p  h5 _( j; \' i0 ]
Suppose 1-6> 7-12
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2 V  [4 S+ O! l1-3 vs 4-6 " G* C+ o  Z5 Z5 n+ h, t: A) U
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Then Weight the Third
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Suppose 4-6 > 1-3# `. p' |2 U# i2 D/ a0 a

+ b( l% N4 [9 m, ~; n- g5 OJust like the first Step
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4 vs 5 & R3 K- [) y' x

# ?8 l' {6 f$ D) a3 y6 Wif 4=5 6 is the fake one + _" [% X/ v8 O; P

$ o, ?% i% F$ s. hif 4>5  4 is the fake one : n& o$ u9 c6 Q2 X- p
and so on......................

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問題第二步
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Weight 1:  1-6> 7-12% G( }1 G1 ?+ z

4 a  f7 ?/ u7 f& rWeight 2:  1-3 vs 4-6 , if 1-3 = 4-6
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+ ?: Q- }  G2 d' B" n你第三步点去搵 7-12 边一粒???- a" o$ _' E  _
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========================================! _( }5 E/ `1 E4 w+ E

9 V: d" R  v4 B4 S( L問題第三步% k" f5 U7 q  v3 C$ Q: f8 i8 G

& K$ R( Q! z, W' pWeight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3
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1 d. ]  h+ s/ \1 T$ |5 h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