Across
1
Collection of distinct elements
2
Result of raising a number to an exponent
3
Exact correspondence on both sides
4
Result of addition
5
Single numeral from 0 to 9
6
System of ordered marks for measuring
8
Closed shape with straight sides
Down
1
Part of a line with two endpoints
2
Result of multiplication
7
Symbol representing unknown value
9
Divisible by two