单选题In the puzzle above, what should “X” be?A5.B4.C3.D1.

单选题
In the puzzle above, what should “X” be?
A

5.

B

4.

C

3.

D

1.


参考解析

解析:
推理判断题。根据文章最后一段:“The rule of the puzzle is to fill in the grids(格子) so that every row, every line and every 3 ×3 box has the numbers 1 to 9.”可知,规则是填充格子使得1~9每个数字在每一行,每一列和每一宫中都只出现一次。根据这一规则可知,X为数字1。

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