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 os.tvboxnow.com) f0 C7 {- U" M4 L4 g

# O& ?; H. W9 z. g8 J, R5 |- {is it b??

roymak82

thanks

iii222

I think is C.公仔箱論壇; m' H( Z; v1 I9 I" ^/ K
os.tvboxnow.com, h# o& H7 x5 v& Z: A& ~! {
Since A & B will have no way to know, and D did not know the answer.
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1 @. I( u8 {, o  Z# h公仔箱論壇This is a tough question for grade 1.  
0 c5 i& C4 G2 v0 K8 o公仔箱論壇7 i' a: Y/ @' |/ d9 |) B9 e1 g! O
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" ^_^
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8 X" N! g# r; O4 {7 B+ N* x1 |tvb now,tvbnow,bttvb偵探型的數學題目 ^^

man0223

thanks for sharing

oftenpie

看不太懂規則