Aye.....I got O Grade arithmetic and O Grade maths.
On the day of my Higher Grade maths exam, I decided to go to the pub instead.
A wise choice.
Yes, I got both at O Grade. I am convinced Arithmetic was separated so that some of the windae lickers could get an O Grade as it was pish easy. As for maths, well God only knows where I'd have been without learning about pi, intadgers, isosober triangles and Pythagorus' theorum.
Ah! boingboing got there before me. He is a mathematician too.
My wonderful new fbreoptic broadband has been on the blink.
I don't think the 2 girls together represents multiplication, it's merely 4 girls = 20, therefore each one = 5, but yes, you could take it as the way you've done it but I don't think it's meant to be that complicated.