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+ I/ a+ C+ z; V0 H9 m
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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)。0 e: `' }+ V# r# M6 P
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？』- Z0 i8 v: ?) p0 m1 T7 d

2 K) I" B, H# r" d1 J注意:
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$ e+ D+ G, U& V; p# J1. 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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1 J; _& ?: }, S: [) h; c2. 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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! k/ C- i+ O1 r7 E. `# a9 q, j[ Last edited by playbr2 on 2007-3-1 at 11:54 PM ]

guswan

Originally posted by playbr2 at 2007-3-1 21:34:$ `$ g* q% y! O( `! F
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 h5 X- v5 W  S: t+ ^% s等我搵下仲在吾在) I- p1 c7 }* E5 ]4 b% O  y) y! q
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當日用左37分鐘答１２粒波子，差７分鐘才合格。
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( z+ @( a! z' K4 F4 S- I( O# x[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:4 {: _5 P* F6 k2 `+ f6 }
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我以前畫左個chart去答,
& U. E0 k) B1 n& L" d' G7 a等我搵下...

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) o4 z( R/ b- m, u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:
, \3 ~+ x+ F* q4 G, v/ V* `' c* ]唔識隱藏...已經諗到..

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sor !!!....e加改左8 r1 N0 i5 v- U  }9 W

0 I* Y. |: y4 ~/ p* P' W8 d0 ~/ v2. 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- a- D$ W* c( l4 c
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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:8 `/ y9 m# y) Z( e. U
相信e條題目都有吾少人玩...

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  \& A/ f/ ]% Q% z9 Z6 [5 P- c+ XPlayPlay, 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:% U& u1 n3 R8 H% E, r/ i# @

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PlayPlay, Let me know later who has the right answer and I will add points accordingly.9 F6 o+ B: K0 n3 a/ }
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Thanks

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" v3 |& `; Y5 v! i! p2 k% _$ w不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.2 v6 @) q5 l0 r2 D6 G4 L# o
1-6 vs 7-127 ~$ A( p* V, ?2 a6 v5 ^- h
if 1-6 = 7-12     13 is fake
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Weight the 2 time
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Suppose 1-6> 7-126 p# ^& _7 k$ I  X" m" v2 n. g

3 Q% }' d! B+ T8 Z0 X$ O. T1-3 vs 4-6
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* S3 {4 M1 i- Z! Z" B! S- TThen Weight the Third
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Suppose 4-6 > 1-3! V# q: t. @" u: B8 y& J
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Just like the first Step& c/ E' {# d5 B3 ~9 }6 d2 o" p

$ U) C% y- U; P5 K4 U; c- P4 vs 5   h6 P7 X0 T, Z( o# L$ N/ y) R0 x  i

8 _  I6 R) ]0 I/ s) zif 4=5 6 is the fake one , A: U/ [3 D9 {- Y1 z- l2 g. J
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if 4>5  4 is the fake one
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and so on......................

hello1997

分3組4隻波子秤
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/ W0 x, I7 G! f/ b4 mGroup A: 1,2,3,4
' O3 S/ w  i' i: DGroup B: 5,6,7,8
1 [& M: ~1 W4 \, P1 p' \6 x' |Group C: 9,10,11,12. P- k; q" j+ c+ L1 _0 y
Group D: 13
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Round 1+ Y; m9 ^; [0 T0 [- O) O& ~1 b1 ^
Group A vs Group B
' T6 v" K. Z) Q! H  l; e3 @如A and B一樣, 即較輕一粒在Group C or D
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, u* ]8 l; S8 |' [( dRound 2
, V) d# ]" s( f4 c+ K再在Group C拆成:! Q1 X2 e$ r" E3 W/ [* z2 P8 l2 l* r
Group Ca: 9,10
2 p/ T  A! q( V/ t4 rGroup Cb: 11,120 X9 y5 J2 }, `8 u+ c1 @
然後再秤, 如一樣, 即13為較輕一粒.
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' k" C5 _5 L& T/ C3 d; f如不同, 即較輕一組有一粒較輕波子在其中, . E5 b. g/ ?2 a1 R9 U# \
要再秤, Round 3, 之後便知答案.: K; b" V& ~" ^$ J

0 a& L$ L! I6 H( S, A) Ge.g. #1 假設10為較輕的一粒
/ L* a. J" s' A) ?Round 1
- {* h5 P& k5 r; l1,2,3,4 vs 5,6,7,8 = equal
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( G- f4 x3 v8 a( Q; K7 I( fRound 24 G& u0 B+ d/ {1 y6 K/ D* h9 h
9,10 vs 11,12 = 9,10 < 11,12
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8 M, Q0 i" S9 }Round 3
' Q  k) s, v& f9 vs 10 = 9 > 10
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6 Q2 C/ C. U2 k( F% pThe answer is 10.
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e.g. #2 假設7為較輕的一粒. G( L, W& x3 g, C$ A6 _* g5 h5 W
Round 19 t" g0 s$ l! ^  p. J3 K
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 @* Y% q1 q, a  m0 v; r
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Round 2
4 u# Q! k' D+ X- U5,6 vs 7,8 = 5,6 > 7,8
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Round 3
# C# D! t: x8 V  N+ o' A7 vs 8 = 7 < 8
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$ N0 h; t2 V- h: g. F1 v9 rThe answer is 7.
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$ {/ J% @' p" J4 Ze.g. #3 假設13為較輕的一粒
; A& D0 Z2 h9 y0 _/ S4 P1 E1 TRound 1" b: F. Q9 A  z4 P4 j; }9 M6 d
1,2,3,4 vs 5,6,7,8 = equal
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Round 2. _5 L* d' v7 A6 Z& ^! ]
9,10 vs 11,12 = equal3 k1 J5 u8 K/ M; ?2 e
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No Round 31 o! c) r& ~( U5 r- d5 K- |7 U
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The answer is 13.
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! ]" |: j* C3 J+ h唔知我答得正唔正確呢?!
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; E* G! S8 p7 ^6 G# \[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:; j+ x7 E; L: ~% ]* C
1.
, U" q8 N4 M3 f8 ?1-6 vs 7-12
" Y; v2 k, H" k# ^/ hif 1-6 = 7-12     13 is fake
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: ^* ]  S1 b, z) `( N) v8 q; s* Mif not
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Weight the 2 time
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& Q7 q( ]( a2 {/ t+ }3 b, P2 pSuppose 1-6> 7-12
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1-3 vs 4-6 , q9 w! H, d& c: S2 X

# G7 p3 H+ ^; Z, u& vThen Weight the Third' U' p: `1 z: {0 G
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Suppose 4-6 > 1-3: I' k$ Y+ [& T. L7 I
: q  e3 s: r3 ?! ], x+ }' y# {
Just like the first Step/ w/ K& ]- l- K" A+ f9 l

2 N  [1 v' i8 Y5 z, K4 vs 5
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* a. f% Y% M: dif 4=5 6 is the fake one
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if 4>5  4 is the fake one 3 E0 R0 W# D- j
and so on......................

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5 D( X5 u, }- D9 _& L問題第二步, X3 Y; O( G; K% e& }5 A

4 H* H% F" d4 s* o' fWeight 1:  1-6> 7-129 W4 |. G, p; t+ s" G% F
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Weight 2:  1-3 vs 4-6 , if 1-3 = 4-6  f/ S# ^: e; }: W2 o/ T
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你第三步点去搵 7-12 边一粒???& \/ Y* e4 R2 o; P! ^

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問題第三步
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 # {! t/ W% U  ~5 h; \8 Y! p, C: S
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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