A suggested cognitive limit to the number of people with whom one can maintain stable social relationships. It has been proposed to lie between 100 and 250, with a commonly used value of 150.

plural of mixed number

The number, on a bib, that is used to identify entrants in a race

plural of contact number

A telephone number that someone can be contacted on. / (geometry) Synonym of kissing number

(dated) telephone number

plural of Carmichael number

(mathematics) The nth taxicab number, typically denoted Ta(n) or Taxicab(n), is the smallest number that can be expressed as a sum of two positive algebraic cubes in n distinct ways.

plural of Heegner number

plural of taxicab number