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 5.39.217.77:88988 ^& T) D" h9 w. A' n. r

: ?: D9 A/ n4 Ris 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.  . |' t% {; \5 i$ }) g( Q1 a+ ]4 ~

7 B' ^+ _5 o8 \0 J8 b6 Q3 sI most likely cannot answer it within 5 minutes when I was that young.
( F% h  Q# I3 w* ?( m5.39.217.77:8898& ^2 ?4 H; o5 \- M; l
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" ^_^- h# l% z* x+ }, Y3 x4 J' O5 t
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偵探型的數學題目 ^^

man0223

thanks for sharing

oftenpie

看不太懂規則