Daniela fills a 3×3 table using the digits 1 to 9 so that each field contains only one digit. She
Daniela fills a 3×3 table using the digits 1 to 9 so that each field contains only one digit. She has already placed the digits 1, 2, 3 and 4 in the table as shown in the diagram. Two numbers count as "adjacent" if the fields which they fill have one common side.