### White Hat Guide To Communicating Value

NUMBER definition in the Cambridge English Dictionary The best known of these is Euclid's Elements, dating to roughly 300 BC. Of the Indian texts, the most relevant is the Sthananga Sutra, which also covers number theory as part of a general study of mathematics. During the 600s, negative numbers were in use in India to represent debts. However, in the 12th century in India, Bhaskara gives negative roots for quadratic equations but says the negative value "is in this case not to be taken, for it is inadequate; people do not approve of negative roots". Brahmagupta's Brāhmasphuṭasiddhānta is the first book that mentions zero as a number, hence Brahmagupta is usually considered the first to formulate the concept of zero. In common usage, a numeral is not clearly distinguished from the number that it represents. A computable number, also known as recursive number, is a real number such that there exists an algorithm which, given a positive number n as input, produces t