Across
1
Symbol representing unknown value
5
Longest side of a right triangle
6
Rectangular array of numbers
8
Difference between highest and lowest values
9
Line touching circle at one point
Down
2
Single numeral from 0 to 9
3
Visual representation of data
4
Line crossing from corner to corner
7
Number divisible only by 1 and itself
10
Part of a whole number
11
Divisible by two