1
A two-digit number with a 1 in the tens place and a 0 in the units place.
2
A two-digit number where both digits are the same.
3
A two-digit number beginning with 1 and ending with 2.
4
A two-digit number beginning with 1 and ending with 3.
5
A two-digit number beginning with 1 and ending with 4.
6
A two-digit number beginning with 1 and ending with 5.
7
A two-digit number beginning with 1 and ending with 6.
8