If I take away 4 how many are left? [, 6, 2, 1, 4, 7, ]
If I take away 6 how many are left? [, 5, 4, 2, 1, 3, 8, 6, ]
If I take away 2 how many are left? [, 6, 5, 2, 4, 1, ]
If I take away 3 how many are left? [, 4, 5, 2, 3, 1, ]