howardc888

Answer is C.  Many people already explained it.  :)

susu_nel

D应该先答对。D可以看见B,C是什么颜色，他就会有1/2机会答对

我是步惊云

interesting questions

kammandang

1# wasimasterQ
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is it b??

roymak82

thanks

iii222

I think is C.
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Since A & B will have no way to know, and D did not know the answer.公仔箱論壇, ?5 \/ L5 `+ ^5 @# Y

* Y" ^" f  m% d& S; l6 y" Z. u$ kos.tvboxnow.comThis is a tough question for grade 1.  tvb now,tvbnow,bttvb! |) r' {( [" Y1 B" H( a
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I most likely cannot answer it within 5 minutes when I was that young.
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Wow, really enjoy this question.  Thank you for sharing.

mirrorabc

Thanks for sharing

GN2160659

thanks for sharing

greenland

answer pls...

wa929

thanks for good question

edwin_8888

thank for sharing

24456430

看不到图片，做不了题目

shijin

總覺得這類型的題目 都是在考驗"邏輯思考" ^_^- C4 z8 |% S8 s( }
公仔箱論壇) b# L  N- N3 |
偵探型的數學題目 ^^

man0223

thanks for sharing

oftenpie

看不太懂規則