Place one digit from 1 to 9 in each empty box so that the sum of the digits in each set of consecutive white boxes (horizontal or vertical) is the number appearing to the left of a set or above the set. No number may appear more than once in any consecutive boxes.
Wrong example. Digit five is twice in one sum.
11
|
5 | 5 | 1 |
Wrong example. Sum of all digit are not equal to number on the left side.
11
|
6 | 5 | 1 |
Correct example.
11
|
6 | 4 | 1 |