Stage 9 - Q10 - 6 marks
19656
Challenge: Start with 190 seedlings. On each of three days donate 18, then sell one of the fractions one half, one third and one quarter, each used once. The final stock is 22. All sales and stocks are whole numbers. Recover the unique order and justify it.
Hint
There are only six permutations; a table of successive remainders keeps the search systematic.