After suffering two mild strokes in two years, I wanted to be assured that my brain was still as creative as before; I continued to design exercises that were more challenging.
Ironically creating these more challenging exercises was a way of challenging my own brain.
I am aware that some of you might want to experience some of these more challenging exercises.
Here is an exercise I woke up in the middle of the night and created, some of my best ideas comes in my sleep.
The numbers in the grid fit a certain pattern, study them carefully and fill in the missing numbers in the two blank spaces.
Click on attachment.