20 25 36 49 64 81 100 (May be reduced to 81, depending on your other selections.)
Add Subtract Multiply Divide
1 through 9 1 through 10 1 through 11 1 through 12 1 through 20
Do not commute addition or multiplication problems. (if 6 + 4 is used, 4 + 6 will not also be used.)
1234567891011121314151617181920