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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: l" w- r$ @+ m$ f* V( H: Eis 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.
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This is a tough question for grade 1.  
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I most likely cannot answer it within 5 minutes when I was that young.
+ e/ U$ O6 M$ W: `1 B6 [TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。TVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。  W) d3 B% R. B* s# `
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" ^_^
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  o, T, p  q% `* w2 |% o& t5 d偵探型的數學題目 ^^

man0223

thanks for sharing

oftenpie

看不太懂規則