|
- 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
8 C% R8 U# ^8 Y- g. f
~, ` y. F& a2 }, E2 ~5 @Group A: 1,2,3,4* a7 Z3 r) y( Y/ @; C/ ]6 y5 n3 M
Group B: 5,6,7,8
; j6 b' `3 {1 o! G+ p* zGroup C: 9,10,11,12
' q, D& `( O7 D; uGroup D: 13& A2 \8 v$ X' X# i9 n+ u7 e
0 r2 n4 T& e0 H
Round 10 _; |% C p J6 Z1 z
Group A vs Group B0 K; U; k. ^/ k0 Q5 p: L
如A and B一樣, 即較輕一粒在Group C or D
+ B/ N7 H& J$ _: ]8 [6 H
' n$ S$ W+ E4 L( P7 k1 bRound 2
, v( I# `+ D0 Z3 k8 F再在Group C拆成:' v4 E+ _/ N' D- s! x% y* R; V
Group Ca: 9,10
7 Y9 T# A6 X u9 |1 ~Group Cb: 11,12 [5 e# K0 {/ U* Y4 j
然後再秤, 如一樣, 即13為較輕一粒.
2 @" t3 g2 X$ K! T) g {
4 U& s) r v5 U/ M5 w7 f; ]' |如不同, 即較輕一組有一粒較輕波子在其中, " l, k5 g3 P H* u
要再秤, Round 3, 之後便知答案.
8 w& a, w, ]" X, h3 `; j+ T) V# ^! d. C
e.g. #1 假設10為較輕的一粒; w! k4 y. ?) R" S# I& o9 G
Round 1
! r3 Z' C9 ^% a: G! l( t, Y7 @1,2,3,4 vs 5,6,7,8 = equal
- s' @2 W# p; X3 X% v* C0 D3 A; ?. b" J: U
Round 2
1 n: P7 k1 M- q" x1 J; L9,10 vs 11,12 = 9,10 < 11,12
; ^- F% S; ]/ ?
9 D+ x$ p' @( x! k7 SRound 32 i% C+ X2 X& R
9 vs 10 = 9 > 10
) |/ F6 R R2 k6 D2 ]# F' p2 j
The answer is 10.
1 w0 s! n- R$ k1 A- M( F1 B" v6 a5 o6 `4 @' ~% k5 z2 n
e.g. #2 假設7為較輕的一粒
) D- p% G1 z6 gRound 12 B7 M( J3 R- r
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8; A2 Z, f2 c+ g# p* N- I7 q
; K- j/ U J7 [7 y' x1 z$ k( \' l
Round 2
1 o+ _4 ^0 i$ i: }, o" V) W2 t2 Q: f5,6 vs 7,8 = 5,6 > 7,81 _8 z6 P* O' @
) A: X6 G: n! R1 {" @- E! TRound 3# ]" y3 A* A z9 M- v$ r9 b
7 vs 8 = 7 < 8
1 ?& R8 x, b+ i' I8 m
; r' p6 ?: E- l) `The answer is 7.
3 p* u8 u1 ~; G# m6 n Q9 j1 N, N, T3 M, y3 E
e.g. #3 假設13為較輕的一粒, ]& n7 b& ~7 \, P, i5 s6 w H
Round 16 R& K3 n% x! @
1,2,3,4 vs 5,6,7,8 = equal/ s, w# n, V0 S! u$ Y' ~9 @9 o
& K8 z1 i+ ^" h& a; v1 }- o
Round 2: F/ W4 |; ~( n1 n
9,10 vs 11,12 = equal% {# U0 b) X9 O$ l
T" d/ {3 M+ e6 [4 r% D. \
No Round 3
$ r) M" x3 M: E' D [; w8 J7 o0 ~) p; R, Y/ |: g; L
The answer is 13.
# p, y5 W0 X1 o" j( b# e: K( D7 s- w; s/ `4 V( A
唔知我答得正唔正確呢?! 
1 O& @9 y9 ^" C6 d J* L, B9 k6 C+ l% {% C5 q" k$ Q
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
|
發表於 2007-3-1 11:57 PM
| 
6 
