which of the following numbers can take the place of the in the table

问题描述:

which of the following numbers can take the place of the in the table
6 2 5 7
8 3 17 7
9 2 9 9
7 4 10

which of the following numbers can take the place of the in the table
应将以下数字中的哪一个填入下表中的?处:
答:应该填 18
每行的规律都是 第一个数 x 第二个数 - 第三个数 = 第四个数