Off topic a bit
The Independent has an article by Alex Duval Smith, "the man who proved that everyone is good at maths"

It describes a French academician, Marc Chemillier, who has written a book , "Les Mathematiques Naturelles" that claims that maths is simple and rooted in human sensory intuition. He has travelled to Madagascar because "he believes that Madagascar's population, which remains relatively untouched by outside influences, can help him to prove this".

Smith quotes Chemillier as saying: "There is a strong link between counting and the number of fingers on our hands. Maths becomes complicated only when you abandon basic measures in nature, like the foot or the inch, or even the acre, which is the area that two bulls can plough in a day."

Ploughing a field with bulls is natural? Isn't that a little ethnocentric and chronocentric?

Smith goes on:

"To make his point, Mr Chemillier chose to charge up his laptop computer, leave Paris and do the rounds of fortune tellers on the Indian Ocean island [Madagascar] because its uninfluenced natural biodiversity also extends to its human population. Divinatory geomancy – reading random patterns, or sikidy to use the local word – is what Raoke does, when not smoking cigarettes rolled with paper from a school exercise book."

The idea that the population of Madagascar is untouched, even relatively,  by outside influences is rather odd. The ancestors of the Malagasy travelled across the Indian Ocean from Borneo, a voyage more arduous than those of Columbus. Since then, the island has received immigrants and ideas from and traded with East Africa, Arabia, Persia, India and Europe. Sikidy itself is a local adoption of the medieval Muslim art of divination, adapted to local conditions.

It is difficult to see how Raoke's abilty to recall complex patterns created by removing seeds in ones or twos from piles proves that everybody is good at maths. He has probably been divining for half a century and it is a safe bet that he has put in the ten thousand hours that Malcolm Gladwell thinks is necessary to turn anyone into a genius.

I suspect, however, that we are going to hear  more about the diviners of Madagascar as universities and schools throughout the world are relentlessly dumbed down. No need to study the needless complexities of calculus: a pile of seeds and illiterate intuition is all you need.