Advent calendar 2017
17 December
Arrange the digits 1-9 in a 3×3 square so that every row makes a three-digit square number, the first column makes a multiple of 7 and the second column makes a multiple of 4.
The number in the third column is today's number.
| square | |||
| square | |||
| square | |||
| multiple of 7 | multiple of 4 | today's number |