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.公仔箱論壇! c6 E1 v/ d% E: b4 v: n
公仔箱論壇" k; n4 W' s) ?, Z0 {
Since A & B will have no way to know, and D did not know the answer.
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This is a tough question for grade 1.  
0 U. D. `. _8 j; h3 K/ l公仔箱論壇5 N1 X$ a6 Q6 K& H+ s% ~
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" ^_^! R; N% a7 ]% o" h

4 t6 H/ x( ^8 T* Q; a: ~4 Ytvb now,tvbnow,bttvb偵探型的數學題目 ^^

man0223

thanks for sharing

oftenpie

看不太懂規則