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 be accurate as possible and think first.
48
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.

.

The answer: 48