A.10 B.20 C.40 D.30

作者: tihaiku 人气: - 评论: 0
问题 A.10 B.20 C.40 D.30
选项
答案 D
解析 每个转盘上半圆的每个数字乘以相同的倍数等于下半圓中相对的数字,第一个转盘的共同倍数为9;第二个为4,第三个为6,故? =5X6 = 30,D项为正确答案。

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