Problem Solving

试题详情

题目:

What is the maximum number of 3×3 squares that can be formed from the squares in the 6×6 checker board below? 

选项:

A、A 4
B、B 6
C、C 12
D、D 16
E、E 24

答案:

D

提问:

没看懂题目意思
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