GCF or HCF = Greatest Common Factor or Highest Common Factor

LCM= Lowest Common Multiple.

GCF : To understand GCF I illustrate an example. Suppose we need to calculate the GCF of two numbers of 16 and 18 , then first we write the factors of each number as tabulated below.

18 1 2

LCM= Lowest Common Multiple.

GCF : To understand GCF I illustrate an example. Suppose we need to calculate the GCF of two numbers of 16 and 18 , then first we write the factors of each number as tabulated below.

**Numbers****Factors**16 1 2 4 8 1618 1 2