Forget geometry, trigonometry, vectors, matrices etc. The most difficult mathematics is simple addition.... kuhesabu kura tu... one, two, three, four can be such a contentious issue. Ordinary people and kawaida institutions deal with much more complex arithmetic problems every day with money, weighing things like unga, measuring milk quantities, or beer .... can you imagine the maths a mama mboga who sells sukuma, cabbage, nyanya, kitunguu and dhania has to deal with every minute of her job every day...... and this simple counting of people that comes once every 5 years is a problem???!!!!!