Вђњnumber Boxesвђќ Вђ“ Thinking Mathematically -

Tell the participant, "Place the numbers 1 through 9 into these boxes so that the sum of each row, column, and diagonal is the same". The Constraint: All numbers must be used exactly once. The Goal: The sum must be 15. 2. Engaging in Mathematical Thinking (The "How-To")

Create a (e.g., multiplication-based)?

. This shows how to predict the solution without brute-forcing every combination. “Number Boxes” – Thinking Mathematically