Complete the grid so that each sub-column column contains the numbers one thru nine in any order using two four-digit numbers and one single-digit number
You cannot use any four- digit number or single –digit number more than once more than once.
This is a relaxing exercise but will still test your cognitive function and give your brain a good workout.
The exercise is not as easy as it looks.
Copyright 2016 Courtney Devonish