Examples of noticing and wondering
I notice three rows and three columns.
I notice that all of the shapes are circles except for one square.
I notice that the "+" and "–" symbols go back and forth.
I notice that the numbers get smaller (if you read them like a book).
I notice that I can replace the question marks by operations.
I notice that the number in the square is a sum (vertically) and a difference (horizontally).
I notice that this pattern seems to work with other numbers, too.
I notice that when all of the shaded numbers are even, the magic number is also even.
I wonder why the pattern always work.
I wonder what happens when all four shaded numbers are the same.
I wonder what happens when I make small changes to the shaded numbers.
I wonder what happens when all four shaded numbers are odd.
I wonder if I can make the magic number equal 0.
I wonder if there is a fast way to calculate the magic number without doing the whole puzzle.
I wonder if I can make a puzzle like this using multiplying and dividing.