In the problem that was given it stated that there were 19 boxes. In the diagram to the left in each row going up, down, and diagonally you had to make the boxes add up to 38. You could only use the numbers 1-19 and you couldn't use them twice. Immediately when we received the probably we thought of sudoku. We figured it was almost exactly the way you would play Sudoku. So a few of us splitted up and started trying different ways. While two of my group members tried coming up with an equation, another partner and I started guessing and checking. Below was my work, this is what we knew for sure and what we weren't sure about. We wrote out 1-19 and made groups of different numbers that added up to 38. While solving the problem we were giving 4 numbers.The numbers that were given were 19, 5, 16, and 11. We were able to choose the spot or the where the number was. So we strategically thought it out so if we got two numbers in one row we could figure out the other numbers in that row. After I felt my group members way wasn't going to work out I just started to guess and check and slowly figured out each number. Below is the solution we got, it doesn't matter which way you faced it, it would all add up the same. I believe I should receive a 10/10 on this because I was there every Friday, I participated with my group by guessing and checking, and I also help create our amazing poster! While my group member was figuring out an equation I didn't just sit there I started guessing and checking. The differences the other group did was they didn't try to figure out an equation they just started guessing and checking right off the bat. The only thing we did that was the same was we both ended up guessing and checking! A mathematical practice we used while solving this problem while figuring it out was critiquing the reasoning of others. If a number sequence didn't make sense my group member would critique me and visa versa.