In mathematics, a set is a collection of elements. The elements that make up a set can be any kind of mathematical object: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other sets. The set with no element is the empty set; a set with a single element is a singleton.
Answers & Comments
A={1,2,3,4,6,12}
B={1,2,3,5,7,11,13}
C={2,4,6,8,10,12,14}
Trivia:
In mathematics, a set is a collection of elements. The elements that make up a set can be any kind of mathematical object: numbers, symbols, points in space, lines, other geometrical shapes, variables, or even other sets. The set with no element is the empty set; a set with a single element is a singleton.