IKMC 2009 - Grades 5-6 Question 25

In the diagram, the total of each row and column is given. What is the value of ?



| | | | Total |
|---|---|---|---|
| Square | Spiral | Square | 11 |
| Spiral | Square | Triangle | 8 |
| Spiral | Triangle | Square | 8 |
| 10 | 8 | 9 | |