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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4 R+ {5 ^6 |& e6 W
" [( F7 i. v8 @! R& U* ^! |" ~& NGroup A: 1,2,3,4
% v& F4 P6 z2 p( t+ ZGroup B: 5,6,7,8+ C# \3 q& Y8 G( S8 {- z4 [
Group C: 9,10,11,12
1 B& t5 I9 M% Q+ e7 E# x/ hGroup D: 13
1 z6 ~$ N H4 h, V3 h- F* [
) R' ~5 _9 b: n, x; ZRound 1
$ T3 e G; y2 W+ Y! l' qGroup A vs Group B8 Z- f, |/ v6 Q; D; m" h
如A and B一樣, 即較輕一粒在Group C or D @) U7 _5 G3 v! B
/ E% y& B" F* ]+ @
Round 2
* c- ]5 A5 K3 t/ I3 F, G再在Group C拆成:2 e: k* v* H2 I! f8 i8 S; u
Group Ca: 9,10
9 r7 v; i7 F+ h3 m0 v H o/ [Group Cb: 11,12
- m# c9 r/ r# h& h然後再秤, 如一樣, 即13為較輕一粒.
( h6 \& c5 Q, O6 A5 Y4 q/ Z l0 T- B* z6 c8 [$ G' o
如不同, 即較輕一組有一粒較輕波子在其中,
" b$ K% s& |4 H& i8 p# e要再秤, Round 3, 之後便知答案.$ A/ v p9 k( Y( w
) p! e5 J+ g, x) [
e.g. #1 假設10為較輕的一粒/ a: H3 u9 W; h# d g! \, x. n, B
Round 1( {0 q8 z/ v3 s4 u
1,2,3,4 vs 5,6,7,8 = equal) k2 C% z. X6 E
! ]: ]6 g( v/ M9 N: I9 ^
Round 2
$ f$ I% `1 z2 A; C+ u9 [$ Q# Q9,10 vs 11,12 = 9,10 < 11,12
4 y* r6 d' y8 u
$ n D; t9 ?$ g, _3 G3 H2 E5 ~Round 3' ~9 _6 l% s; S) K- Q& ]. A
9 vs 10 = 9 > 10
: ~( ?! Q: b% v; i6 k$ O/ |( P( U: u) F, e" t$ J/ G
The answer is 10.
- w' j) R7 N& h' @+ k+ J" ]; q
5 F) f* ^' _4 O- we.g. #2 假設7為較輕的一粒
* e2 H4 I/ L- NRound 1
/ ?* z* }0 L5 H* O) \1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8) W- Q/ G# u5 F
6 I6 h6 v. R* l' A: J+ kRound 2
" V9 [* V8 W3 g; y7 ]5,6 vs 7,8 = 5,6 > 7,89 z: ]0 t+ P! `6 ]6 }' p% K
& I3 U; y& x( q( O7 H3 Z. e
Round 3
5 t4 ^# X: A5 J5 R G t7 vs 8 = 7 < 8+ Z! z" y) b& U) D* t- `; U4 f+ B
! O0 R, o( r- O/ U8 j) VThe answer is 7.0 N+ E s- w8 n( r! q8 K. F
2 q p8 ?3 B9 N
e.g. #3 假設13為較輕的一粒
$ Q6 @# s- |, h0 Y# O& n, jRound 1
% v+ ?# c/ P' P. Z* m1,2,3,4 vs 5,6,7,8 = equal" P+ u. R: k, X0 ^( h+ e
+ W- H3 J0 o2 ^( b- Q' nRound 2
. l. I6 T) c4 ]5 R9,10 vs 11,12 = equal5 r7 B+ j! i& `; A6 N7 s, H- o
' V# l' Y3 F: t. N9 K6 J
No Round 3
4 \# Y; B/ m' r" M8 y4 T4 L: e5 n+ b5 g9 j- t d
The answer is 13.1 L7 ?' S0 ?# p: v- p4 W% A Z
3 f5 [: R& J a8 r) i5 \- l2 S4 G, o唔知我答得正唔正確呢?! 2 z- f3 Z1 P F5 W4 K& o
- v N* r2 g4 j7 n& L[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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