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### 15 Cards in this Set

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 Prime number An integer greater than one whose only positive factors are 1 and itself. Composite number A noneprime positive integer greater than 1. Greatest common factor GCF It is the largest positive integer that divides evenly into 2 numbers. Least common multiple LCM It is the smallest positive integer that is a multiple of 2 numbers. Rational number It is a number that an be expressed as a ratio of 2 integers when the denominator is not equall to 0. Reciprocals (multiplicative inverses) 2 numbers whose product are 1 Square root It is one of a numbers 2 equal factors. Cube root It is one of a numbers 3 equal factors. nth root. it is one of a numbers n Equal factors Set A collection of objects. Union of sets It is the set of elements that appear in any of the sets. Intersection of sets It is the set of elements common to all of the sets. Subset One set is a subset of another set if every element of the 1st is contained in the 2nd. A C B Natural numbers The set of counting numbers, beginning with 1 and going infinately. Real numbers The union of sets of rational and irrational numbers.