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) m7 R) q% z+ P' V

3 Q, \, F/ v3 q& e『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)。+ f& T, |3 R  d' ?6 D
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？』- M; j" ~. Z7 G6 W

0 ~+ }2 B' B$ b: e' t注意: ' b3 f$ x1 p8 i8 ?+ c, o

3 a/ \) u9 e0 b2 E1. 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) [5 k( X1 |7 I/ O- n1 `% I0 @* z
( j  p- I5 j1 M( S1 d
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
3 ]  {" O6 |7 e$ i' i  X% O7 `0 D+ V1 Z# N# h
[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:3 Q; K( a& U, P. Y+ M; V
相信e條題目都有吾少人玩...

$ I1 `6 ]) U) l1 \4 O我以前畫左個chart去答,* |) Y4 g  S/ v* ^3 R& v, l+ Z* n# @
等我搵下仲在吾在
% L3 K& ~1 _) z5 |$ Y& N( S) I2 L# p
& P0 K, r/ k# Q2 v/ Y當日用左37分鐘答１２粒波子，差７分鐘才合格。* S8 q8 S( {5 R* n
13.........
; Z7 \9 O/ n' D- T5 k1 d0 G' f4 Z+ k# b/ g2 [" k, Q
[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:
6 K: m; D( E6 e6 E
1 s8 N+ \" Y9 F$ i" T, @" `我以前畫左個chart去答,
8 ^5 Q; P# k) V等我搵下...

8 I0 U1 M/ a, e6 ?8 M; x4 y' `
* f: c5 J" w1 @4 v
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:
+ u4 s% G$ V3 ?7 F& t唔識隱藏...已經諗到..

( K& a9 q0 Q/ g9 r- g* R& q+ t

8 I/ F, F3 q0 U) Q- w0 ysor !!!....e加改左
# C1 O" D% A! H0 b# W- L6 M5 K  H7 A* N& h7 e
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5 }7 E3 g- t; c  |& m
$ _  z9 b+ b' i. b$ `) p
[ 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 m% X) h5 N* d3 b相信e條題目都有吾少人玩...

& s) E$ n8 `+ _  z3 g4 j3 p$ g+ V7 m- N
PlayPlay, Let me know later who has the right answer and I will add points accordingly.
2 O% n$ h9 g/ {2 M. K" X) h
( O* b; U" [: J. I& {Thanks

playbr2

Originally posted by Triangel at 2007-3-1 11:57 PM:3 X; J9 D% u" }) q; l/ n! |% f* i
* o) Z: O1 z1 H+ m% q( y
7 C( J# x7 [! ^& N  R! n# i; J
PlayPlay, Let me know later who has the right answer and I will add points accordingly.7 w2 Z3 }2 v+ n. J7 S
; l9 U7 b% \  |: n3 s
Thanks

2 ^3 t# Y6 b& S) j3 f
% W* s& ~9 Q  J2 v( f" X
不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
2 }$ S; B0 Q* \# Y8 n1-6 vs 7-12
! P; z- r- \/ a7 P2 l$ g% H/ }if 1-6 = 7-12     13 is fake
" [( W& ?  [7 q" |- k7 w2 |- T* ^9 c6 G
if not 2 n/ R9 F0 E! H+ Q+ U( m& |7 R

  N% m. p0 @7 g/ O: w: uWeight the 2 time
) f0 e0 C3 ]9 Z: b* E$ \; }
8 {' z8 S& @: q6 D4 f  ^Suppose 1-6> 7-12* `  R/ {- j+ J# U1 x3 X
0 Q0 |, _5 \0 ?# T9 Q8 i
1-3 vs 4-6
+ \, X0 Y9 }  a8 N
% J1 w% z" i, Z3 K' s: x9 RThen Weight the Third- K0 _+ Z6 z% M: A; C2 R4 I
3.
" n0 z3 X& _9 f
' a* u% _$ g- h1 U( N2 x- g" zSuppose 4-6 > 1-3
) w4 U8 w" ^3 r7 n/ [* X5 e& {8 l4 X+ |7 M
Just like the first Step4 y$ l! e, E3 S. b6 {6 ?6 x% u3 m
' ]! J9 E5 t- h0 _
4 vs 5 0 [2 H. U2 }  I& `; S: v
, t, t  p5 d9 d; ]- G9 t
if 4=5 6 is the fake one ; m: w( y% q# K5 @- x
2 l1 E6 J) J! m4 y: D
if 4>5  4 is the fake one - |' r8 [/ \$ `/ S7 ^# R  G
, z, Y/ V+ c& s3 c' C
and so on......................

hello1997

分3組4隻波子秤
  ~9 [/ E5 F  K: I" G* T( N; e: c: U4 k
Group A: 1,2,3,46 N' F( u; B9 `# f; I1 R
Group B: 5,6,7,8
; I& `$ T" s% Y% WGroup C: 9,10,11,12
- A! c% v& T" A& p* y+ P7 \Group D: 13
( Q  j4 q; C, W% X7 S2 [' ^+ r- l* @1 J/ x8 N8 v
Round 1$ j! S8 l) E( U, v  V
Group A vs Group B/ C0 ~- G3 ^2 [
如A and B一樣, 即較輕一粒在Group C or D+ Q: o* j- ]! B, s. i2 ?% K
' p' O" l1 b. I- H. c2 `  s
Round 2
. g' _0 F9 n" @" o$ @" a# U& u& m再在Group C拆成:0 n8 k+ X0 b$ ~( N  V) E
Group Ca: 9,10
# h, R2 x; V; l# _1 [+ MGroup Cb: 11,12% a+ V( J" F+ K6 q) W) [% W
然後再秤, 如一樣, 即13為較輕一粒.
+ Y3 V& m  _3 f% [' I9 y
2 k' `/ x4 [$ V* A3 a如不同, 即較輕一組有一粒較輕波子在其中,
" E: R/ E6 G- X; d* B+ U要再秤, Round 3, 之後便知答案.! L' X% l; T+ X* C) c

& c. V! o- q( X2 @# z6 O% f, \* Ke.g. #1 假設10為較輕的一粒
* j$ t2 n3 p8 b" lRound 13 x2 ~3 T* z" u* s
1,2,3,4 vs 5,6,7,8 = equal( Q: j8 a4 A3 g! X
8 L/ }( Q& {* R& y, L2 S, _: e
Round 2& F- @4 w# p7 |* [
9,10 vs 11,12 = 9,10 < 11,12
: R1 D: W; Q- q' m8 t- F; F. s( J' f8 o$ b) I6 w" D% o
Round 3! U5 A, a. a' A% Y7 S$ {; ?7 `3 b
9 vs 10 = 9 > 10
5 ~- u6 B' [/ e6 `+ `1 `: W
- S/ ~: |7 q* U9 o. k" P# WThe answer is 10.
  A2 G0 w, c5 O7 A
, p8 c6 w- }3 F: F( A& ye.g. #2 假設7為較輕的一粒) f  N4 y+ h. T! b' U
Round 1
0 _1 @8 J8 o; z% Y, S1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
- t: n+ O4 e- }5 c: H! S. o. g
3 v! p: N6 E- b" J: ~, _0 bRound 2
4 I3 V" }/ E$ E* R+ x  C0 x& m5,6 vs 7,8 = 5,6 > 7,8+ w5 B( U, Q7 y. `; y
3 g, v/ _3 P% ~+ t1 \; l
Round 31 w" [/ ]. F: h# s4 Y7 X
7 vs 8 = 7 < 8
1 o6 t" C- }& Y; M: p) a
  E" z3 p! x9 g; r; d3 q0 HThe answer is 7., i, b4 M+ A$ U9 h5 j" s& c

6 v8 V: u* o$ w' i( V- Be.g. #3 假設13為較輕的一粒. j, N" `  n6 c6 v7 F
Round 17 B+ r- u& I4 [) t
1,2,3,4 vs 5,6,7,8 = equal6 C! Q, I& a8 Q2 c% G( t7 s

) W" h, F1 ?/ [( O3 IRound 2
) r( d8 _1 z+ e5 G* n9,10 vs 11,12 = equal' T, ~7 [5 c% a
5 Y4 }+ N) D0 c  I
No Round 3
! Y) A. i( Q4 F+ [3 h( F! z5 H, l2 i8 c
The answer is 13.
* J5 @/ D2 A7 K7 x& r) a8 V1 ~; Z. c9 ]- b5 _  y" ]  v* E( a
唔知我答得正唔正確呢?!
6 r9 j  \" P  O$ h! k0 L/ c: L. t; g8 s& c5 r
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:' z+ V1 f. c+ D8 c4 r
1.3 P" S/ Y# Y; ?+ g6 q1 k$ W9 j
1-6 vs 7-12
& U0 |" M7 l! C; p% f5 J7 w7 D0 Jif 1-6 = 7-12     13 is fake
- v; k4 {, \4 V! G1 ]( h
, W# V, G$ i. f1 }3 n& l3 ]if not , Q1 v, C7 y/ i6 I- u7 S9 A( F2 }

: X' ?$ s0 ?. ]3 o$ x9 B; tWeight the 2 time
2 F5 V5 B& O8 Z) \- C1 e! B9 L1 [" Y$ ]2 z1 L6 l5 H% s
Suppose 1-6> 7-12
( S: t* Y1 W* C* q) A& O  b; t" \' L
1-3 vs 4-6 * Y+ X2 j; {+ }6 T3 W! Z  {
8 n, Z; Q5 E5 v! o$ z
Then Weight the Third
- ~5 s1 @, z2 \3.
7 U2 D' N* [0 i! a% l
" e6 X+ w$ o, C" f- m3 gSuppose 4-6 > 1-3. B& V8 a( K7 w2 s; U

& L) V0 y  [/ bJust like the first Step$ N8 }, V* v" n' e) {% J- L
0 J% Y) \3 h3 t; A# J: W% }0 U
4 vs 5 ! l; s! j; R1 w* [3 Z
9 B5 e+ n* Q  N4 b0 h( v
if 4=5 6 is the fake one 6 h; D- @. y* Q  s7 L' e. U9 I3 U/ _
# @5 ?4 _; \% d9 x' R
if 4>5  4 is the fake one
! c% d8 p8 o/ w4 ]& d" x0 i/ ]7 rand so on......................

, f$ [7 \, V8 E. ~+ u/ y6 F2 S. ^
* e9 C& s7 t1 f' O4 |5 I4 Z' w
/ l0 ?0 l# c; `+ s; p問題第二步
3 T3 i% S0 q# v! w# z
6 N& n) N' [$ [* TWeight 1:  1-6> 7-12% h& E; ^- F7 N% S' ?8 `9 h" s
  E/ p: I/ Q- i: E9 e
Weight 2:  1-3 vs 4-6 , if 1-3 = 4-62 i' S6 j5 a4 \! Q

8 S7 J, a3 p( g- O0 N# P你第三步点去搵 7-12 边一粒???6 ?/ ]$ G* r" d0 L

2 x' h$ b. {) \+ ?; E( ~========================================# E: |. g2 ]$ d1 B/ ]$ e

6 F" M' r* ]4 D7 J問題第三步! h3 ], l8 [5 J! s# {, R9 V8 t$ S
& p' p$ q# b7 ~& i. s) Z
Weight 1:  1-6> 7-12
- T$ O2 ?- {+ l0 `! Q3 z
0 T% f6 X/ V9 KWeight 2:  4-6 > 1-3
% ^/ I5 ^% [" @: i
4 m; W9 `* `2 t8 C3 `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