You can make the groups equal but there will be one counter left over. All numbers ending in 1, 3, 5, 7 and 9 are odd numbers. All numbers ending in 0, 2, 4, 6 and 8 are even numbers.

The winning numbers in Tuesday evening’s drawing of the "Texas All or Nothing Evening" game were: 3, 4, 5, 6, 7, 10, 14, 15, 16, 19, 21, 22 ...