Question 26
This is a magic square, so that all rows, columns and diagonals add up to the same sum. Some numbers are already filled in. When we complete it and multiply the numbers in the three shaded squares, what do we get?
| | Column 1 | Column 2 | Column 3 | Column 4 |
|---|---|---|---|---|
| Row 1 | 16 | a (shaded) | 2 | blank |
| Row 2 | blank | 10 | c (shaded) | 8 |
| Row 3 | blank | b (shaded) | 7 | 12 |
| Row 4 | 4 | 15 | blank | 1 |
| | Column 1 | Column 2 | Column 3 | Column 4 |
|---|---|---|---|---|
| Row 1 | 16 | a (shaded) | 2 | blank |
| Row 2 | blank | 10 | c (shaded) | 8 |
| Row 3 | blank | b (shaded) | 7 | 12 |
| Row 4 | 4 | 15 | blank | 1 |