One week he brought in a 2-digit number of glass items, a larger 2-digit number of metal items and a still larger 2-digit number of plastic items. For each class of item he received a 1-digit number of green points.
Among the three 2-digit numbers and three 1-digit numbers involved, all the non-zero digits, 1 through 9, appeared exactly once.
If I told you the total number of items brought, you'd be able to deduce how many were glass, how many were metal and how many were plastic.
How many of each category were there?