Let’s start with the definition of the two terms HCF (also called as GCD) & LCM.
•It stands for Highest Common Factor.
• It is defined as the greatest number
which is a common factor of two or more given numbers.
• It is also called as Greatest Common Divisor(GCD) or Greatest Common Measure (GCM).
For example 35,45
35 = 5×7
From the above we notice that the Greatest Common Factor is 5.
•It stands for Least Common Multiple
•It is defined as the smallest number which is a multiple of each other.
For eg:- 3,6
Now let’s look into one more small concept
Co- prime Numbers which is useful here.
Two Numbers are said to be Co-prime or relative prime , if their HCF is “One” .
There are many such numbers.
Example:-HCF of 11,13 is 1
Therefore , 11 & 13 are co prime numbers.
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