|
 
- 帖子
- 591
- 精華
- 0
- 威望
- 53
- 魅力
- 50
- 讚好
- 0
|
9#
發表於 2007-3-2 12:35 AM
| 只看該作者
分3組4隻波子秤# O- ^4 s) ~# w: B& u5 d1 ~
4 {' L+ K" _% O7 Z1 K# m' hGroup A: 1,2,3,4
/ @( Q% S/ z5 Z; } {Group B: 5,6,7,82 g8 i+ w! h8 N' F: z/ [
Group C: 9,10,11,123 G+ u8 ]3 ]5 b8 V8 e. _( d
Group D: 13
# C7 X# d* m' R/ E& S, x, Z9 J# W9 x0 \2 H( h# J
Round 1* O0 @/ d* a$ n$ h, S. `
Group A vs Group B
6 e" L) E( k6 |; |% y3 ?如A and B一樣, 即較輕一粒在Group C or D i) J1 }/ G' ]- }& @% c+ f
3 U9 R N- q4 ?/ S7 E% O8 d$ t% o7 BRound 2, z, S& N" t( \9 I9 n
再在Group C拆成:
9 Z6 R! V! J4 }+ @8 W. u' U, z; vGroup Ca: 9,10- ^& K, X8 L# `
Group Cb: 11,12
! S& i5 T7 e* N: `& V. l( q5 g然後再秤, 如一樣, 即13為較輕一粒.
% `& J' w% v0 a& s, S9 ]5 @: {
# u9 \2 F) e% D. ?- ^! x3 p如不同, 即較輕一組有一粒較輕波子在其中,
% |0 ^' l0 ]# ]5 ~要再秤, Round 3, 之後便知答案.# `( m' z% i0 B, e+ i. c
! X5 ?% T7 w6 ]4 i( x) b- p
e.g. #1 假設10為較輕的一粒
# d0 G2 {+ [; Z NRound 1
/ F0 w7 Q2 ^0 X, A6 r, E: n1,2,3,4 vs 5,6,7,8 = equal% [5 t4 j. h) W
6 k1 [% W5 K+ G6 \, H" k
Round 2
1 U* I1 T6 G0 }3 Z& s* a9,10 vs 11,12 = 9,10 < 11,12" ` m! \* z; ^7 P& R% X( d
3 | b) K1 }* @: n% oRound 3
% S2 k8 C. a0 n+ h+ e5 `9 vs 10 = 9 > 10
& X5 l3 S( \& I, \4 |1 B$ E D
/ Y) ]7 R2 m' l nThe answer is 10.
( m+ E" C9 B U" g# f4 a9 _
8 q' V( {# d3 [e.g. #2 假設7為較輕的一粒3 Q+ P1 V4 p' G+ z
Round 1
$ q; X, n, X) ^! T5 E4 G% A1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
5 k3 K# Q) l& w4 b8 F+ v6 N5 C- m, ~$ {3 x* V9 }+ o7 _. W |
Round 24 |" U% s3 w7 s/ n% J' U
5,6 vs 7,8 = 5,6 > 7,8: Y& Q/ J3 D, F: J' L
4 l. }5 c* u5 M! E" kRound 3- W- k- N# S( l0 l
7 vs 8 = 7 < 81 P: J1 _# x' W/ M9 m7 z3 g
' I& w, D n4 c+ ^9 y
The answer is 7.
, V# ~, `: y# z6 L+ x# T- e- \8 W g# {
e.g. #3 假設13為較輕的一粒
& c1 K: b; K3 ]: z, t" \Round 1
) u* H$ T; K& Z9 {. H1,2,3,4 vs 5,6,7,8 = equal
1 @3 t- p& B9 M! P9 Q
9 Q" ]/ Z8 x$ y' Y, \0 SRound 2
9 d" N* @. \1 X3 I z1 W: ^# l9,10 vs 11,12 = equal& E5 V$ T, I0 A i, P/ c
/ G+ S: c# r/ T! }# }2 C0 a" `' kNo Round 36 O% Z9 r. t0 v2 ]. N ]( p$ _: u
8 \3 C2 B. l8 @7 U5 X; X- ^$ B
The answer is 13.
: C) }/ ]2 z7 Y( P! Z C! W6 R- U( k9 G4 D: p. t) h8 p
唔知我答得正唔正確呢?! 
# {5 b9 V1 _! w7 u
7 G+ }! g8 w) S& \+ ?. T[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
|