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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
. a6 q \) o1 \# n, M8 c2 `1 S
4 U- r1 r8 q" R/ ~8 y' a3 eGroup A: 1,2,3,46 C( E: q$ J3 ]5 ~, x
Group B: 5,6,7,8
9 Y; G" s& b" @( v" z0 L7 x$ m% ?6 n2 Q7 MGroup C: 9,10,11,12
, \& @& o9 z- m, ~3 y9 c' }- {Group D: 13) f! m7 I: q4 J4 V
) D5 m5 \2 C4 Q' ERound 12 w+ i7 h- J2 ?& T
Group A vs Group B
7 n5 X$ C; o: j0 P8 S' e) x如A and B一樣, 即較輕一粒在Group C or D! H5 i, N9 K4 t7 J
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Round 2* D, t/ P. s X6 P
再在Group C拆成:3 u. g, v$ m& `8 [ @
Group Ca: 9,105 g4 c# t% J M0 ]6 h9 K
Group Cb: 11,128 D5 z) L" B4 {4 j `( ]
然後再秤, 如一樣, 即13為較輕一粒.
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如不同, 即較輕一組有一粒較輕波子在其中,
" ?9 S) D$ M+ O5 k要再秤, Round 3, 之後便知答案.5 M; {2 W1 p; d8 \" n
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e.g. #1 假設10為較輕的一粒
2 Y% C& a$ y9 \& ]Round 1
6 I3 I. r& m! r9 T& T2 T1,2,3,4 vs 5,6,7,8 = equal4 D# U8 [+ E% W, H
) v* R" c2 o' Q
Round 2
! f4 Z$ k' K5 o# v9,10 vs 11,12 = 9,10 < 11,128 z% b! n3 m9 L: u
( k j' @4 r& YRound 3
. I" ?% `1 [; M8 T9 o9 vs 10 = 9 > 105 O3 E" T& N0 G! b
& e/ m7 U0 q6 h9 `5 @5 x8 [. X" `The answer is 10.
9 [% A4 q5 s# i* `& m) b; H+ r9 r, V3 T6 k D
e.g. #2 假設7為較輕的一粒- Q" ]" n3 _ A, _0 ]. H& w- u
Round 1! W% a% @% R/ ]
1,2,3,4 vs 5,6,7,8 = 1,2,3,4 > 5,6,7,8
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Round 2
4 H( N2 R$ ]. U7 I6 `4 d5,6 vs 7,8 = 5,6 > 7,8
$ G' e' k. \) Z) j0 w# M3 M A" Q" W2 U: _
Round 34 p( f7 X7 E2 e) z6 D. A9 L
7 vs 8 = 7 < 8/ A0 I( N% q5 S# Q
; B+ v7 Y/ f7 \3 }: ]4 a, Y
The answer is 7.1 Q! h0 {$ X. x4 ^3 Z8 b/ h$ [
/ i! P) q/ x$ {: [e.g. #3 假設13為較輕的一粒 n, _5 s$ _7 [8 w2 R
Round 1
* F1 D* E& X; T. p1,2,3,4 vs 5,6,7,8 = equal$ Y9 z' o+ A5 J1 n" D% D- _
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Round 20 I% e& t7 x! r% a" y! r
9,10 vs 11,12 = equal) K# K+ K8 v" l! e6 G1 J
u) n9 G, U" \8 cNo Round 3
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The answer is 13.9 a/ l0 R' d% q% N% H8 Z3 c7 b3 _! t8 U
2 W; w3 R% G3 Y% _
唔知我答得正唔正確呢?!  9 N% P z! r6 u+ \
+ z! }* A+ ^0 j9 `6 ^0 L4 {
[ Last edited by hello1997 on 2007-3-2 at 12:39 AM ] |
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發表於 2007-3-1 11:57 PM
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