Number Sum
The following grid of size 5x5 is partially complete with whole numbers from 1 to 7.
The sum of each row and column is shown on the edges of the grid.
Fill in the missing numbers to complete the grid.
| 20 | 24 | 20 | 21 | 18 | |
| 21 | 5 | ||||
| 23 | 2 | 6 | 6 | 2 | |
| 27 | 4 | 7 | |||
| 17 | 2 | 1 | |||
| 15 | 3 | 4 | 5 | 2 | 1 |