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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# r+ k$ m' T: G7 ~
1 b5 N' K$ L% J
Group A: 1,2,3,43 ?: K: |1 @! ~8 X9 [5 N
Group B: 5,6,7,8) m( D: w4 [# j3 w: S
Group C: 9,10,11,12
( C! W( V M- O3 pGroup D: 13
/ l6 s0 j2 R3 t2 v
1 y- g! A. i, @) hRound 1
3 m7 }5 v2 c/ X; S; ~; R9 z- L! xGroup A vs Group B
; ^; T& H; j0 c, J如A and B一樣, 即較輕一粒在Group C or D; a7 d& ~/ E/ G4 ^" t) Y& \
+ f+ M9 n* ^! e. W: Q! B5 a; zRound 2: x* m, l) a+ n: S" C z( ?
再在Group C拆成:/ c4 `1 ]1 y1 o. L
Group Ca: 9,10
1 [" J$ @) o& o+ t$ a. SGroup Cb: 11,125 n1 f+ l2 z2 A1 w3 d% h% f( c
然後再秤, 如一樣, 即13為較輕一粒.
/ i/ {: ?( m/ F! Y8 n6 N; T7 I/ ?
如不同, 即較輕一組有一粒較輕波子在其中,
; j' L* h; k! \9 A要再秤, Round 3, 之後便知答案.' A8 L4 x9 z# J8 ]0 H
1 R5 f8 K* P% p# y+ b+ {9 t! \3 Ze.g. #1 假設10為較輕的一粒
, ~8 y6 ?# L8 \" n6 V! bRound 10 y: _, G5 I3 H! l$ x
1,2,3,4 vs 5,6,7,8 = equal& H# u. g; ~4 I, S$ H' k# l( D4 L( s
1 ?+ Q9 E' B7 _3 K7 l) Z
Round 2
& m. B" W4 |- w2 r& u9,10 vs 11,12 = 9,10 < 11,12
- Z! j7 H9 s7 M0 s( |- R' I9 E W+ d1 u, J R3 s
Round 3' B e1 p- v# R; u$ b! x
9 vs 10 = 9 > 10
% M% Y7 A/ H8 X
& ~4 D: ?( p6 I) I4 P5 r5 DThe answer is 10.! @. h6 s0 Z' D p$ L- |5 ~+ g, n2 P
" d! ~( d+ ~" s- r' ]% E, t# A
e.g. #2 假設7為較輕的一粒2 p1 U' i% T' r6 ]' E4 P
Round 1
/ Y9 r- I" S/ o0 ^. v1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,84 P0 _1 T! Y# q- b W, U. P
& O0 i( x6 c8 l2 e: l
Round 24 z5 `) K" W' i* R' r/ F
5,6 vs 7,8 = 5,6 > 7,89 N0 j |5 ], s- |2 {7 d
1 ?/ d, c, x, D7 [* @
Round 3, S: ^8 p9 @4 Z) V4 [' e
7 vs 8 = 7 < 8! _$ w" W F7 J
/ B0 D& ^1 z! T! }: bThe answer is 7.
- m9 R% H" A6 ~9 W2 G% c1 g/ s1 c, A
e.g. #3 假設13為較輕的一粒
( J8 A* C1 C0 a" H. a- j4 a' T: V, MRound 12 |, q* _+ i% o. V
1,2,3,4 vs 5,6,7,8 = equal3 |" u# G# }! s3 X
, G2 }2 x( M# K" {% u% j
Round 2
2 Y+ T1 L/ ~/ D: T; k9,10 vs 11,12 = equal' ~" K: x4 o% i! W
- T) q" R) ^- U/ |9 X0 l3 v) P9 s, N
No Round 35 @. ^5 D+ h( k y8 m
3 v9 N" y# L( k) ^+ @2 p/ s0 X9 YThe answer is 13.
5 {& o$ w3 u, X* y+ Z7 X/ S
9 q0 N2 o) n4 s7 Y唔知我答得正唔正確呢?! " x0 P3 O( v, x. T! C/ y9 r
" ^$ k; R0 D7 f, ?7 Y, D9 o[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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