1 through 9 belongs in each square of the diagram. Digits may be repeated within a number, and no zeros are used.
In addition to completing the diagram, you must also provide an explanation for each step of your completion. When you place a digit in a square, write a sentence or two explaining why that digit belongs in that space. You will receive no credit if a solution is submitted with no explanations.
ACROSS
1. Each digit is a perfect square.
4. This is four different digits.
5. The second digit is the sum of the other three.
6. The second digit is one less than the sum of the first and third digits.
DOWN
1. This is four consecutive digits, in either ascending or descending order.
2. This is four consecutive digits in ascending order.
3. This is a perfect square.
4. One of the digits is the sum of the other two.