I have thought long and hard about this and I don't want to spoil the thread, however, I would like to clarify a few things.
I do enjoy setting the questions, it's as much for my benefit, as it it for others.
Most posters are lovely and I appreciate your kind comments.
However, there have been a few snippy comments to me in PMs about the questions being too easy or too difficult and various other complaints.
This thread was meant to be a bit of fun.
I am trying to please a wide audience, but I can't always get it right and please all of the people all of the time. I do not have a maths degree!
You do have to give me marks for trying my best!
The lack of certificates: I had decided to award a golden apple in lieu of a certificate, as posting a certificate, means making it, putting a poster's name on it, then changing it to a jpeg on another program before posting.
I shot myself in the foot there, as that takes time.
Now the serious side is over, do your worst!