Across
1
Line touching circle at one point
5
System of ordered marks for measuring
6
Parts per hundred
9
Difference between highest and lowest values
10
Result of addition
Down
2
Number divisible only by 1 and itself
3
Divisible by two
4
Collection of distinct elements
5
Exact correspondence on both sides
6
Number greater than zero
7
Sum divided by count
8
Math using letters for unknown values