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 i; F7 Q% X& u1 J, m

* U4 ]/ r- P* K4 F『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' @/ j& J; c" a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？』7 ~. K. y# @( H+ S9 V* t, i  L

. C* n9 b) H. V3 i) b注意: 4 |8 [+ M7 N, o

, b% y$ p/ J( f7 ^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. \' D4 @5 U2 U/ C$ v' v& q

, @7 r) w- u# U5 c: J1 R2. 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) W4 ~9 [+ y# 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:
4 g0 i* a. x. p3 A9 Q9 K相信e條題目都有吾少人玩...

  X' X! [  x$ ^/ P我以前畫左個chart去答,4 Y2 i+ [7 O: `& M
等我搵下仲在吾在+ G% j7 `4 q0 c  ]" k1 _. J, @

. b3 k5 v' J4 [7 z6 F( l1 B當日用左37分鐘答１２粒波子，差７分鐘才合格。
! t+ {: b6 }, x8 {- _& |( \( n13.........
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; r' Q5 h/ m. E, ~9 D4 D5 D/ B[ Last edited by guswan on 2007-3-1 at 09:44 PM ]

playbr2

Originally posted by guswan at 2007-3-1 09:38 PM:2 q5 F8 l( K; H4 y

6 d0 r' _0 x: ], g8 a我以前畫左個chart去答,
6 R! N2 R; {. t0 Y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:! o* t! D- F. ^* w
唔識隱藏...已經諗到..

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9 V( [6 {! C" jsor !!!....e加改左: V" M0 E. r( y. f7 ]8 Q5 f

1 f% d% |" q, e2. 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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[ Last edited by playbr2 on 2007-3-1 at 11:55 PM ]

Triangel

Originally posted by playbr2 at 2007-3-1 09:34 PM:& B  z- S% ~, T9 K% U
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.# d$ C* P* t9 y" ^$ W  P

2 K$ R7 P: ?1 {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.
. V7 N9 |0 j  a1 U1 A' x7 _) ?: o+ h: d& U: ^4 s" y3 F$ T3 T
Thanks

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+ \1 s* N5 p/ U' a% @5 `% k不如你都玩吓喇....叫d叔叔加分咪得囉........如果岩既話

Azuma

1.
$ `4 D( e+ H' M! ~% z0 Y1-6 vs 7-129 B. w- o9 R- S3 D" T6 c# ?; z
if 1-6 = 7-12     13 is fake, Q5 P2 k: A. b- [0 r  L/ Z

3 `  }! `$ A5 s( _- _if not 9 p" @% y% o, c0 G& _/ q) a

% |) Q# p( X4 U/ F. h) hWeight the 2 time
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Suppose 1-6> 7-12# n- `7 r0 [* @$ m% n
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1-3 vs 4-6
7 M7 E8 y7 _# f# h9 k/ ?% @& j) ?
Then Weight the Third
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/ W5 m4 y1 a9 Y4 [4 o3 l0 i) P  @Suppose 4-6 > 1-3' ~0 \6 D1 L) c  Q

- w- C- z$ o( N$ ^; q5 \' V* _Just like the first Step
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0 }. [3 e/ [1 `. S7 x  i4 vs 5
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6 k, Y  z! I; ]if 4=5 6 is the fake one 4 {; m) a: K! D' k' q

1 M7 @- y' h2 \  S) sif 4>5  4 is the fake one
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$ A7 p+ X3 t. C* E, K: C6 _and so on......................

hello1997

分3組4隻波子秤8 ^4 ~. C; _! _7 r: q

. A, Q& b- M' kGroup A: 1,2,3,4. t1 G% V7 E0 l3 J3 l
Group B: 5,6,7,8
) `0 F! I, U8 }- u7 zGroup C: 9,10,11,12& K( u# J; A( a/ z. b2 O
Group D: 13, x5 s+ L. K2 N9 C! q. z

5 k2 n/ b4 i$ p/ Z# B+ A: u( pRound 1
/ U" m* ^: i) dGroup A vs Group B/ X8 |" a$ r( X8 l5 V: B* p  l
如A and B一樣, 即較輕一粒在Group C or D; V$ d8 w  C/ J# [4 m
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Round 2
9 Z* I  x* u9 ~1 s. o再在Group C拆成:3 k- `3 ~+ G# E9 ~, ]  C0 P
Group Ca: 9,10" a& g& V1 L- ]4 M, I* _3 z
Group Cb: 11,12: H/ ^* y3 h0 O& ?7 W
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中, $ @3 {! |( X' Z
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/ e# f4 s# t4 y9 B0 j5 m" ?
Round 1: d8 c* Y2 a2 ~& v* C/ H
1,2,3,4 vs 5,6,7,8 = equal
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. H7 Y- E& U1 \; y4 r6 `Round 2
; O5 ~: k+ r1 ?0 Y6 j/ V# v9,10 vs 11,12 = 9,10 < 11,12
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Round 3  ]6 i3 h/ G. W* k1 |/ j& Z  M1 e
9 vs 10 = 9 > 10
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6 K) R; G. U: cThe answer is 10.
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e.g. #2 假設7為較輕的一粒. ^8 d1 F4 A4 _
Round 14 ~$ H% w. c$ C! M' q" q7 [
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8, j2 A6 H2 ?+ X, i, W
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Round 28 {8 `& N! L8 Y$ u0 I5 q5 n& d4 f
5,6 vs 7,8 = 5,6 > 7,8: X- I! y  y5 I% |# z" {4 n

: z: G. R' y5 x( xRound 30 K, T. t' M1 D$ S$ c. f  r3 p
7 vs 8 = 7 < 8
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! W/ U( O8 Y$ x" k8 w: iThe answer is 7.8 C/ [- M. Z; g+ p

3 O5 R7 I! Q) o* S+ K, N4 a" |3 re.g. #3 假設13為較輕的一粒4 N' R' R  x- u! \* o) T
Round 1
+ g% s$ O- @4 M' D7 ~8 o+ c6 F1,2,3,4 vs 5,6,7,8 = equal+ [: w9 r# `; }3 Z5 w
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Round 26 R$ S/ a% M. Y2 a" m3 E
9,10 vs 11,12 = equal
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4 u& K- ^& y4 H1 K4 t9 x+ X$ `No Round 3
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  A. P- P3 s' j' }9 |, V: nThe answer is 13.
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唔知我答得正唔正確呢?! / `# X+ ?( _$ i2 d3 Y# }

* }% A# k! F% d$ r' b[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ]

playbr2

Originally posted by Azuma at 2007-3-2 12:25 AM:
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1-6 vs 7-12
& A+ q  O) [! ~& G1 t  zif 1-6 = 7-12     13 is fake
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if not # N' {0 W4 J' D$ K4 Y4 o. y
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Weight the 2 time
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5 M. h$ H" m# @8 U+ M0 |Suppose 1-6> 7-12
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: o- i" c: A& @  a) N8 Z4 C+ F1-3 vs 4-6
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6 i0 k  F2 n* d/ iThen Weight the Third- I. u7 N) V5 ]( z5 s1 E- Q+ Q* h5 L
3.
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* B  T" U2 q% e: y8 KSuppose 4-6 > 1-3
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Just like the first Step
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( Q8 U# q  F' F2 D. p4 vs 5
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% I/ D' l3 v% O7 Rif 4=5 6 is the fake one : h* L+ `9 N$ h9 t, o2 |

/ \" k/ q/ {! W" W2 @& ~% H6 {if 4>5  4 is the fake one + o3 Z/ Z4 E2 W  z+ L7 b
and so on......................

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問題第二步
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6 T9 \* N& Q! Q4 c! ^7 K7 a# cWeight 1:  1-6> 7-12
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8 ~7 n! Y! `& M6 n/ l; rWeight 2:  1-3 vs 4-6 , if 1-3 = 4-68 U8 g3 V! M! ~! u. k

) s3 e- d+ `# C5 c& {你第三步点去搵 7-12 边一粒???
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& C* C7 B" x% {' U  v========================================
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8 P4 j3 D  h4 E問題第三步5 O6 r9 `" M- H
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Weight 1:  1-6> 7-12
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Weight 2:  4-6 > 1-3 . W" }2 @( K( w  |$ G0 p
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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