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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; T5 `- V: l) G1 K8 _2 Y& e5 V5.39.217.77is it b??

roymak82

thanks

iii222

I think is C.
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' l! h$ q, A+ w, L) Q. zSince A & B will have no way to know, and D did not know the answer.
# B. D8 [5 E0 q4 @5 f+ ^% z7 `公仔箱論壇" [4 o1 ~* u+ i8 _( u5 f
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.5.39.217.777 h: S& b9 i9 z6 q6 p$ U  D2 w7 l
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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" ^_^( y) H9 B0 t! v7 b
tvb now,tvbnow,bttvb0 F/ Z  N% \- G2 u( s" o& j* ?2 n; Y
偵探型的數學題目 ^^

man0223

thanks for sharing

oftenpie

看不太懂規則