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9 C4 @+ J( k( ]3 y# C0 V

3 r  V: y" e) L7 ?' w1 L『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/ V# R3 G% x+ H7 {& v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？』( ]! C1 Q& ]; L8 Z% T
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注意:
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- P& B1 `4 b; P3 a8 h1. 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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9 x+ ?7 M7 U8 ~$ ?4 J9 ~* |% B$ D2. 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+ S$ ~: }4 x& @1 w- z
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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:
! L4 f0 o7 S; i9 |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,! ?2 L4 c$ ~, |* G& Q6 b
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。
; ^1 n/ c4 }! u6 |' _  n13.........( {  F8 S& U& |$ P/ ^3 n

9 ^8 _% i3 z2 k3 U[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
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3 J' W2 v* i( k0 N. K) \我以前畫左個chart去答,$ n0 R* x- j6 n: B7 N/ s, y3 g0 ^3 U
等我搵下...

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) ^3 U, O0 ]& g& l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:
, v" d$ F# f3 t, X唔識隱藏...已經諗到..

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7 u, N6 u) B8 l7 ~2 xsor !!!....e加改左3 c' n# O. T6 s  [( E$ q  ]8 t

% y/ I5 d( q6 \, V& |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* e5 C1 Z0 L" Y. Q1 I$ v* e

$ e8 \1 N# C0 x& N- U/ G5 [2 a[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:1 k5 }9 y, X8 J0 o% [, K
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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Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:
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& ~0 p5 E, B# z# P- N8 }4 ?' L5 [/ KPlayPlay, Let me know later who has the right answer and I will add points accordingly.
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Thanks

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/ n& O. [! N5 t+ A5 [" L1 i- a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 7-12
9 O. h5 E4 P& r5 ~/ H  s! e# cif 1-6 = 7-12     13 is fake3 b( d& R$ M5 h6 e/ G- B

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' M' W4 L8 ?; v7 S+ @! }6 VWeight the 2 time
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Suppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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2 g/ }  I5 @' P: n. r6 J! NSuppose 4-6 > 1-3
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8 X) `  h- N: k0 dJust like the first Step6 m, g) Z# E6 F. E9 B% @, y: E
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4 vs 5 6 E% `( d& u# b; w' ^/ `: K# o8 m
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if 4=5 6 is the fake one
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3 \/ j' z" N4 n& D! y8 W$ Aif 4>5  4 is the fake one 8 \- x' U1 a1 P$ }
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and so on......................

hello1997

分3組4隻波子秤) |4 E9 R6 V) A' f+ ^0 T
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Group A: 1,2,3,48 \9 x- y7 {" B7 i) k9 ^
Group B: 5,6,7,8
% A* h4 g/ _! p  D7 D( V" mGroup C: 9,10,11,12
7 E. w% }' a$ C; L1 tGroup D: 13
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7 T& d+ O2 V" K, _, _Round 1
6 _' N  e: ~8 n4 eGroup A vs Group B
( R! B$ c, D8 W* O" J0 p如A and B一樣, 即較輕一粒在Group C or D
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5 D, c! F0 \' l, I1 f9 kRound 2
6 _" x1 g- e8 q1 i; p% t0 Q再在Group C拆成:
1 h* S" w1 e. W& GGroup Ca: 9,10. e' i6 ~* u# ^8 c$ r. [; y8 |- F) u5 R
Group Cb: 11,12! |9 N& R0 v  A( d! _
然後再秤, 如一樣, 即13為較輕一粒.3 w8 V7 g: @, w
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如不同, 即較輕一組有一粒較輕波子在其中,
! E8 U/ [( C( \/ v+ t& k要再秤, Round 3, 之後便知答案.% L8 l. w' m# X& W; F1 h9 Z2 `% p9 W& g- P
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e.g. #1 假設10為較輕的一粒
& B- W, g2 ?# L; q0 }$ o! yRound 1
" h/ n/ Z( ]  F; V  p& L1,2,3,4 vs 5,6,7,8 = equal
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Round 2
* K  H7 q2 ~/ p+ y8 B9,10 vs 11,12 = 9,10 < 11,12
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Round 3
( @8 Z0 t+ l8 S1 h  V9 vs 10 = 9 > 10
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' ~) Q) f& n$ h& a) eThe answer is 10.
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e.g. #2 假設7為較輕的一粒0 v7 y" b  K( s
Round 1
( @9 U3 r5 X& J4 k) t, R1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,85 m# a; N3 g& ]  b1 k
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Round 2/ g( H% o/ B3 j" \& y
5,6 vs 7,8 = 5,6 > 7,8
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: C! S$ X4 G. Z# @! Y, d. yRound 3* |5 ~, p9 p; H, p
7 vs 8 = 7 < 8
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, a% F" F. R' I- q7 sThe answer is 7.
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e.g. #3 假設13為較輕的一粒
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, d% U1 w. t8 X& Z9 n0 a1,2,3,4 vs 5,6,7,8 = equal
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Round 28 a: M. v# y( [2 M# s' }$ Q
9,10 vs 11,12 = equal
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. _  X* x2 X7 ANo Round 3; C! t2 Z/ Q; h  T" F

! t2 H2 H6 g1 V- T1 i" m# ?, q. eThe answer is 13.
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唔知我答得正唔正確呢?! ! e7 \3 C5 G7 \5 m; _2 `# N

4 l( K) J& V" I- G. L% U' e[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:) ^( q: p* f' [$ d2 j
1.: n0 t/ K9 Q4 F, r( p& q! }
1-6 vs 7-12
+ E# K* a0 r) q* e$ Dif 1-6 = 7-12     13 is fake$ s3 \2 L* T; Z, M; S9 C* e5 ?' F' n
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2 C5 X' @) K" T( Y) aWeight the 2 time
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- ~4 i+ |+ m: t8 }( v' T* R/ aSuppose 1-6> 7-12
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1-3 vs 4-6
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Then Weight the Third
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. [: y9 L1 U: |3 Z* A: c, L: R# RSuppose 4-6 > 1-3
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Just like the first Step2 }! j, W' x1 _5 E- L% f; h1 P
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4 vs 5 " e% w. @$ |( b; E
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if 4=5 6 is the fake one
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if 4>5  4 is the fake one
4 c% ~6 h7 Z4 H7 v4 O) p/ p3 hand so on......................

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問題第二步( x. K+ N+ g5 f

4 h2 m, i% R* M& gWeight 1:  1-6> 7-122 Y) A' i0 q! b/ L
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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???) z+ W  `. {) P# Y0 o6 j- `7 U% \
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問題第三步8 O( G8 \4 w/ c: e
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Weight 1:  1-6> 7-12
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8 ~* X- ~& r( x4 w5 t# G7 dWeight 2:  4-6 > 1-3 * k" r% ~) F1 [5 l6 K& j  F
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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