|
 
- 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
% I. t% U" [2 o B* a% H7 {) h. ~: X' A8 }7 z: ~0 G; ?8 b$ F
Group A: 1,2,3,4
% ]4 j+ z+ J, @" m' ^9 P7 l7 A6 uGroup B: 5,6,7,8
9 T0 y# q8 m% }" a$ y9 JGroup C: 9,10,11,12* i1 X6 K7 a, c2 Z4 u& G1 p$ J
Group D: 13
9 B. X2 {1 g) V1 X& W1 z* z& s- o5 f
Round 1
$ Q2 H2 a) D+ d) w+ n1 C, ]3 iGroup A vs Group B
* C% L3 `( x4 q) \0 b) J3 k6 _ [* u如A and B一樣, 即較輕一粒在Group C or D3 }* b2 y+ q% g& m7 h
9 b% w6 n1 W& ]2 FRound 2
# U( V( O, @: \- S( Y4 x再在Group C拆成:
. _ x$ | S* d3 ]; G2 iGroup Ca: 9,10
+ a, Z8 [' Z; B: Y' U# e- PGroup Cb: 11,12- F" X3 F' n* Z0 L* c" M* {
然後再秤, 如一樣, 即13為較輕一粒.
- ]; }9 M. a0 f% K% E* {7 v
- D; D C9 V7 Q如不同, 即較輕一組有一粒較輕波子在其中,
% P+ Y4 y6 C! h# I% Z/ B2 \( L要再秤, Round 3, 之後便知答案.
5 [" y; S$ m( E. X; n5 N8 }' a# n% K( x/ v! i, ]. g: h0 U
e.g. #1 假設10為較輕的一粒
2 K. ~$ S6 F/ r4 _2 g6 J6 nRound 1
* z; \$ X! ?* S3 ?1,2,3,4 vs 5,6,7,8 = equal6 x+ M, V* u& H% w( F0 U
5 H: @/ w5 X7 s2 p2 q' X
Round 2: T6 t* a2 Y- T
9,10 vs 11,12 = 9,10 < 11,12
2 R1 W7 {' n! k" F0 D! c7 K R3 q( f% d$ J" r# j- G) w# \6 ]
Round 38 ]' v$ ?; z" x) J+ v
9 vs 10 = 9 > 10& P" o3 K$ T9 |, L9 V+ v
( X8 x U2 K8 z' @4 O
The answer is 10.
& G8 e- x) i( b' A, f8 V4 \1 u/ B
# @& {3 e! X; F" q! s* X/ Y/ le.g. #2 假設7為較輕的一粒0 L& ^5 l! s) f3 A. r
Round 1/ @% z+ Y$ B; Z2 `6 V) ]/ p% c
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,88 r/ n5 a p+ t# x2 Q
6 v, y6 s2 H3 O
Round 2- G4 }, @6 n( J( A0 X
5,6 vs 7,8 = 5,6 > 7,8; E8 q0 h! H+ L0 A* _
! \& w+ D5 H$ x1 {Round 3
s& E: ~, `) C- |. e$ m. H7 vs 8 = 7 < 8
( j _* R/ f4 t* ~- ?% E
9 J$ k* H; e- {% _/ E$ FThe answer is 7.
+ J* c. O" M- K6 q- H% C4 ?0 H% m
4 C' D9 W; [4 L" z& R) m4 Pe.g. #3 假設13為較輕的一粒
. P* e! N( h! ]9 a5 M \2 ARound 1, e; D+ O6 W: C5 c
1,2,3,4 vs 5,6,7,8 = equal/ u9 }8 x" @. P- p( h" b
& W+ @. ^/ s/ R5 y5 rRound 2
# S- X6 v* q6 d, j3 y$ x1 p0 E9,10 vs 11,12 = equal
6 R% w; Y7 O% t% t5 c
2 K* q0 J4 N+ o5 ~No Round 3; u$ k( B s& D# B( p6 Q& A" t
$ A% j: m6 ~8 D' K1 w
The answer is 13.
* O) E+ x [, W5 j& l7 ^. {; x- r8 f, A3 P0 l, C
唔知我答得正唔正確呢?! % ?/ j2 ~ u, y8 q4 t! W
6 D5 O3 I' X: S1 y# E' D2 Q5 b2 @( T
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
|