There is 12 balls.. divide them into piles of 4
6 D5 K* _$ C- i% a" o' `so 3 groups for 4..name is A,B,C
5 [( u6 S1 W5 J: v- L4 ywww2.tvboxnow.comcase 1:
7 l- A+ h5 c+ _" X) `measure A -- B
1 U2 }& j8 R$ n" l2 h4 E) IA or B is heavier
7 G$ i6 Y( \2 {; a* c/ }$ Fdivide that group into 2 by 2
* ]+ g% X, V+ }5 c* fthen divide heavier group into 1 by 1www2.tvboxnow.com3 \! V* p9 q* W$ A( M
- o$ a$ a' p3 H" a" ?. ~/ Mtvb now,tvbnow,bttvbcase 2:tvb now,tvbnow,bttvb$ m0 Y4 X8 k' Z1 s* {
A and B is the same.. therefore C has the heavier balltvb now,tvbnow,bttvb7 K9 S. d0 M7 N w
divide C into 2 by 2公仔箱論壇, P! U; ]/ p" P' i; l/ o7 f
then divide heavier group into 1 by 1..$ U: W: E- l: O& G$ B4 H
& ~- B7 p& R2 J" v
got it in 30 seconds.. not so hard -.-' |
發表於 2007-3-27 01:35 AM
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一知道有答案睇就唔想谂咁耐了
