Math Challenge

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10
12
7
5
3
6
2
11
8
1
9
4

横向

1

System of ordered marks for measuring

2

Parts per hundred

4

Mathematical statement of equality

7

Rectangular array of numbers

8

Collection of distinct elements

9

Single numeral from 0 to 9

纵向

2

Closed shape with straight sides

3

Part of a whole number

5

Three-sided polygon

6

Part of a line with two endpoints

10

Symbol representing unknown value

11

Line segment connecting two circle points

12

Round shape with all points equidistant