Question 16
Eggs in a certain supermarket are sold only in trays containing exactly 10, 12 or 30 eggs per tray. That is, it is impossible to buy exactly 14 eggs or any odd number of eggs. However, it is possible to buy exactly 78 eggs using four trays of 12 and one tray of 30. What is the largest even number of eggs that is impossible to be bought from this supermarket?