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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! z+ t+ {9 H0 L1 h" F' B1 Ctvb now,tvbnow,bttvbis 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.
  m9 ]7 A3 c( I8 |# i* \8 G7 D" \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。- M5 A6 v3 \( e% G0 P3 W' ]" Z
This is a tough question for grade 1.  
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& Z2 U& ?4 l4 ?& W* }$ ?os.tvboxnow.comI most likely cannot answer it within 5 minutes when I was that young.
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$ {: |3 h# Z  l0 ?8 H  Z  t6 @tvb now,tvbnow,bttvbWow, 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" ^_^公仔箱論壇7 {' A5 E: b, q) n" C
) S2 @  B, _# H
偵探型的數學題目 ^^

man0223

thanks for sharing

oftenpie

看不太懂規則