Anthology of stories, humour, poems, etc. on mathematical topics, published in 1958.
Series of steps which is seemingly correct but contains a flawed argument, or a spurious proof of an obvious contradiction such as that 1 = 2. Fallacies differ from simple mistakes in that there is an element of concealment in the presentation of the proof.
Modern successor to arithmomancy, embodying the belief that numbers can explain the workings of the universe and thus allow predictions to be made.
Any positive integer greater than zero that has only two proper divisors, 1 and the number itself. Thus the lowest prime number is 2, which is also the only even prime.
System of using letters to represent numbers, an idea that was developed by the Phoenicians two thousand years before the founding of the city of Rome.
A perfect number is a positive integer the sum of whose proper divisors is equal to the number itself.
Number that when divided into another number leaves no remainder.