Generate Unique Times Tables Questions (array)

Hello,

I had a great deal of difficulty working out how to use arrays to generate a set of unique Times Table questions.

i.e., I wanted

6 x 2

3 x 2

5 x 8

7 x 9

But if 3 x 2 came up again it had to be discarded and different equation generated.

I have solved my problem and I thought I would post a commented capx in case some one has a similar issue in the future.

Also I am quite keen to post to see if I could have done this more efficiently. For example, I am not so happy that I need to use global variables.

GenerateUniqueTimesTableQuestions.capx