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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
# R1 K9 C6 V3 {8 J, T9 C6 n: l, x- f, W; a4 K5 T$ l* c9 a/ y
Group A: 1,2,3,4% P8 d, n: I" g3 f* ^' {
Group B: 5,6,7,8
! V9 T1 x- S2 S- Y6 LGroup C: 9,10,11,120 V: n9 B4 j" R8 Q% n
Group D: 134 j B5 I2 j7 h( B6 ]
( x4 B* s: R) C( j) l/ ^: d( zRound 17 P' C* Q4 S6 l& T+ H) C
Group A vs Group B
* g0 s5 W9 e5 F; c! ^! e4 C如A and B一樣, 即較輕一粒在Group C or D
% n: h. M% ]6 U, J# ]. u; T H. v3 l* d' k. E+ }1 U
Round 2- K3 S9 z9 ]: x- o) A
再在Group C拆成:
. v' `) M8 i6 f# ^: ~Group Ca: 9,10. P' j( ~6 R! H1 T/ e
Group Cb: 11,12* e' j1 M0 t1 D, p% P
然後再秤, 如一樣, 即13為較輕一粒.
2 {" e$ n- g* _, Z1 s: I6 q5 l0 I" F/ E- x7 c/ k2 \% S+ I% c( ]' j$ b$ w
如不同, 即較輕一組有一粒較輕波子在其中, - u l! q+ a( V' r$ }5 D( A
要再秤, Round 3, 之後便知答案.6 u5 F( o% I v7 g+ g3 k3 T0 E' o
) ^; ]9 c6 Z( n" B: x# g3 l
e.g. #1 假設10為較輕的一粒
4 {+ f7 O' v2 r1 e. {1 x# vRound 1+ j) f. T; p+ B- |
1,2,3,4 vs 5,6,7,8 = equal0 K- G9 K' ]6 @$ L
( U) z$ `( X# ARound 2
. c5 r; k6 q" D4 n, p9,10 vs 11,12 = 9,10 < 11,12: h: O! P0 Y$ a, o4 R- i
0 B2 T) _1 c$ ^1 [3 t( v* jRound 3
& p5 b& x" B: F6 w# N" x+ O9 vs 10 = 9 > 10
- b/ ]. A+ f4 p' r. H% m
0 y9 B4 K4 f% n6 u @ M+ ^The answer is 10.) ]% }' c9 C$ i* Z6 j4 w3 A, \
+ ` b* f) i/ |: g: j! e
e.g. #2 假設7為較輕的一粒
2 }' ~( a: i( |' T8 w. M- XRound 14 e) `) m6 P+ s2 `! e
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
1 o+ V; h' r% X5 X9 r# V) v1 y& L0 j2 Y q/ K3 x) K0 R1 d
Round 2
$ s% x" H4 V0 h/ A0 @4 v5,6 vs 7,8 = 5,6 > 7,8
/ _+ c, f0 C" A9 m5 W7 y' V+ A- t+ f# b7 g0 S( q6 Q: h0 N
Round 3& H# ~ s9 v1 b. [) t7 C5 d
7 vs 8 = 7 < 84 P6 S% Q0 m1 s- y# d
. v4 j+ j6 I! A4 c5 S9 H s5 h3 l. s$ {0 F
The answer is 7.) O4 u5 w6 }/ b n
1 a3 \2 h* f( P; ]- E' x/ K
e.g. #3 假設13為較輕的一粒
- F! w Y- Y: t9 w, m, v1 O* wRound 1
( _7 Q* v) ^ h! O1,2,3,4 vs 5,6,7,8 = equal
+ N% H# V$ L' h% C, k! I! c# ?! [) J
Round 2
. G+ N4 |" W* N# k; ?6 g0 y" J: K9,10 vs 11,12 = equal
7 u. B7 I( l4 r4 n
3 p2 ?# M5 G7 r2 n- QNo Round 3
' U' l I$ k# Z- w/ \! H0 D, j: l- N0 t/ b; @& ~% R
The answer is 13.
0 [; |" w6 r v0 p2 C* R, I
+ g2 h/ F6 A9 i7 u) k3 {唔知我答得正唔正確呢?!  % {1 Z$ y& t8 E% ~
7 N# p9 U$ P/ v4 M
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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