skipman:

his shame at the western civilizations ignoring the contribution to maths they had made,re pi, sines and co sines.

Thanks for the link skipman. The minds back then also had useful arithmetical formula such as how to quickly calculate the square root of a number mentally- damned if I can remember the rule, it's written down somewhere :) As a child I had trouble with the 9 times table, so a kind teacher showed me how to do this using your fingers. Hold both hands out in front of you, so 9x1=9, using your fingers fold down the pinkie of the left hand to reveal 9 fingers left, for 9x2 fold down the ring finger of the left had and you get 1 finger and then another 8= 18 and so on.... brilliant!

AllSpark:

@wensam..... URL

AllSpark, an honour indeed ;) tee hee- I looked at a short bit of the clip before it got stuck, will have another try later, thanks