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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
- G, M* W" H, j2 A$ T" o: Q" M- Z2 j6 j/ `6 L* L
Group A: 1,2,3,4
. U* h$ ]9 l) B4 G0 g- [Group B: 5,6,7,8
" Z N' g8 L0 `, K! dGroup C: 9,10,11,124 \2 ~$ v7 `9 T" y4 V
Group D: 13+ y- [* h G; ] ]2 Y
' V# w* ?% |* [$ ~9 n) |% A
Round 18 }- v# }4 c6 s- d' E7 c
Group A vs Group B) q2 m$ |- B7 K. m2 J
如A and B一樣, 即較輕一粒在Group C or D
) Y7 r& z0 Y4 ?: {" E0 z+ A6 x3 h, [9 `; a6 A; h
Round 2% S. ]5 r( x) Q
再在Group C拆成:: i& m8 o) ~" J( e1 e
Group Ca: 9,10
- G4 _* E' s9 k' Z+ H# Y" FGroup Cb: 11,128 L6 q0 b. I9 k( e
然後再秤, 如一樣, 即13為較輕一粒.
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8 Y/ _1 w) E, X0 q1 O如不同, 即較輕一組有一粒較輕波子在其中,
, b2 P4 M, E7 R- p- f6 a要再秤, Round 3, 之後便知答案.. W) g: r# t* \8 p8 y% G8 D
7 L) F( n2 J8 xe.g. #1 假設10為較輕的一粒. P2 ?6 x/ D4 t. W% ?, u# ^; v
Round 13 Q/ Z, ~8 A# x1 E9 `
1,2,3,4 vs 5,6,7,8 = equal& c0 k- C1 x0 v) t
, W8 Y# L: G: j G; W" K; iRound 2
5 H+ m& _# h$ l0 y* c- a' k9,10 vs 11,12 = 9,10 < 11,12; K5 \, S3 \ l" X+ Y2 M* t
% g: R4 ^, m* c' }Round 31 N* Y. D7 t6 D5 ~/ U
9 vs 10 = 9 > 10, L3 w3 |( m% J/ H
& q% c& p @! X9 ~3 J GThe answer is 10. f0 t1 i" d, D! d
4 U$ ^" Q. D7 s3 D
e.g. #2 假設7為較輕的一粒, V; H1 h. I3 k$ n
Round 1
: X0 s7 X; x6 p, X1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
8 v4 c1 G; D5 Y" B, K/ k0 j
9 u- z- m1 {( n/ A9 ?( C9 @; I$ [Round 2) s$ Z. g5 R" d+ Q/ o
5,6 vs 7,8 = 5,6 > 7,83 G* g" j* X* I% Z% j, @% F, i
% a4 m- `3 i: I: m5 ~9 a9 Z: ^Round 3
{% Y$ y* t+ _, U. [) }# w7 vs 8 = 7 < 80 `5 u$ N: P Z5 L4 A$ ] d4 D
$ b9 y: H2 Q( B, l" o' X" C" Z
The answer is 7.
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e.g. #3 假設13為較輕的一粒" o" G W/ r- ^0 G. k. N
Round 1
1 T& J" B5 V J1 j' |) ~1,2,3,4 vs 5,6,7,8 = equal# B9 z& N6 U9 |
( P6 P8 w; L% I8 eRound 2' z/ P( v# e( S1 D+ a
9,10 vs 11,12 = equal. U! ~& p; ?" Z4 j3 _: B1 ]5 l! Q
c* P' L% g. D. fNo Round 3
: ~9 ~; z2 b3 n+ C
8 z4 P' u# y; g# EThe answer is 13.; N, r- ` Z8 T2 ~7 j
' H# ?$ i" v" }* A/ E- k* d" P唔知我答得正唔正確呢?!  5 f* E9 s9 \+ X' d
6 }6 W! x6 r! {" l" w) {* ?* ~
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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發表於 2007-3-1 11:57 PM
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