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發表於 2007-3-2 12:35 AM
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分3組4隻波子秤4 b5 }" z; u+ z7 ]3 s" |* i3 {
2 }) }2 c! K$ C y, k0 ?5 U" w
Group A: 1,2,3,4
C! Z/ A2 W& ]7 I9 Q: }Group B: 5,6,7,85 O* i6 y' m' ^
Group C: 9,10,11,12+ p. j# Q/ M" u
Group D: 13* ]2 U. C4 J7 Z, v
4 E! s$ b3 S5 x/ X* QRound 15 T! f5 V# x% F, k, r
Group A vs Group B
" V: e' `$ x, h- M9 m4 Z如A and B一樣, 即較輕一粒在Group C or D# ^; d8 A3 J6 _' s3 U
/ B$ d5 [5 z# _4 T
Round 2
* \- T2 e+ G1 Y+ E( j( T$ X A再在Group C拆成:
5 H6 c% d! `$ h) G/ {Group Ca: 9,10
9 F( d6 n" E5 X; I1 aGroup Cb: 11,12' P( \. |! ^% ~0 l- z# g2 m
然後再秤, 如一樣, 即13為較輕一粒.
9 q" i* ^* e; R9 r, C3 d
% v8 \" {* O- H% O0 M如不同, 即較輕一組有一粒較輕波子在其中,
: P: j- m" {& V5 Y要再秤, Round 3, 之後便知答案.9 m. D" ~4 h P8 ^# }
/ i6 Z6 G% n( w* U3 T. M
e.g. #1 假設10為較輕的一粒: ?8 h, X/ d: ]1 p
Round 1% n/ `5 Z# q$ u! s) v; V
1,2,3,4 vs 5,6,7,8 = equal
. s# O" t; Y( w, m
6 p; |7 j5 `# g3 R+ u1 z: w3 a1 TRound 2
5 l5 F& G9 [. |9,10 vs 11,12 = 9,10 < 11,12( G/ a! [! \7 \# @
_. k9 A, ?8 o6 i( k$ Z0 O; VRound 3
0 C; k/ E3 P# h% ?9 vs 10 = 9 > 10
9 ]3 x: N! O/ j) T2 T2 t( W& ]: y5 N$ c) N, r1 o4 Y9 M0 c& {- a/ M
The answer is 10.8 Z, T9 Z! y: I+ n" w
6 j' Y8 h: Q, F, G) v) `
e.g. #2 假設7為較輕的一粒
9 C4 f8 j% T( C3 ^' {Round 1' f4 V: g5 @+ W6 L) l9 a1 G
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
4 H3 b& S A7 ^. w, R
; H8 Z! g8 n6 \) V* m9 D( HRound 2
) t- d3 A) w$ {7 j$ u5,6 vs 7,8 = 5,6 > 7,8
7 _) R& @' Y( d. d
6 g* d. P- ^1 L( bRound 3 p- s7 Q1 J3 ]# T
7 vs 8 = 7 < 8& x; H% a- R- e3 d3 d* y
8 x" A) C; X* T5 WThe answer is 7.
7 |5 x$ e8 c9 L+ `7 ?3 @. m5 W9 C; q; n. G" R# A: ?, W
e.g. #3 假設13為較輕的一粒7 I# q2 n1 |" B; a
Round 12 U& r6 i; V/ f4 E6 ~4 G( B$ g( t
1,2,3,4 vs 5,6,7,8 = equal
+ M3 J6 d! ^' h P$ Y
: ^3 a/ a3 p" b7 i0 L* xRound 21 U9 H' e$ q+ l" W6 O' |' w" G
9,10 vs 11,12 = equal
2 [0 r2 K4 q& @* }1 Y3 G. A- f+ ~$ B8 ?( V. J; P- a, S. t: ?7 a6 }6 z
No Round 35 `8 U3 ^& W! G2 ~. m
0 ]' T7 O, K: ?& F* R* jThe answer is 13.
8 v2 ~0 C) P$ L# Y |
/ {, j" g( b) u, z) e) f; j唔知我答得正唔正確呢?! 2 K4 n, A% a. k5 u8 h* z
# e: s, J8 p+ P- c8 H2 V) ]( p
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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