In a week, Mortdecai collects 8 dozen eggs every Tuesday and Thursday, and he delivers 3 dozen eggs to the market and 5 dozen eggs to the mall. He then uses 4 dozen eggs to make a pie every Saturday. Mortdecai donates the remaining eggs to the charity by Sunday. How many eggs does he donate to the charity? Let's think first. Chain of thought:
Mortdecai collects a total of 8x2 = 16 dozens of eggs. He sells a total of 3 + 5 = 8 dozens of eggs. So, 16 - 8 = 8 dozens of eggs are left. After using 4 dozens of eggs to make a pie, 8 - 4 = 4 dozens of eggs are left. Since there are 12 in 1 dozen, then Mortdecai donates 4 x 12 = 48 pieces of eggs to the charity.
Therefore, the answer is 48.