横向
1
Rectangle with four equal sides
4
Divisible by two
6
Result of multiplication
8
Math using letters for unknown values
10
Middle value in an ordered dataset
纵向
2
Corner point of a polygon
3
Repeated addition
5
Number greater than zero
6
Lines that never intersect
7
Number with digits after a point
9
Value that does not change
11
Collection of distinct elements