Problem of the Week - Lower Elementary - March 7, 2021 to March 13, 2021

Lower Elementary: 

Question: Alice the librarian has a cart of 3 dozen books to put back on the shelves. She puts 3 of them away before she's startled by a ghost and runs away. How many books does Alice leave on her cart? 

Answer: 33 books

Solution: since a dozen is 12, Alice starts with 12 + 12 + 12 = 36 books. After she shelves 3 of them, there are 36 - 3 = 33 books left on the cart.