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Greatest Common Divisor (GCD)
let us consider the divisors of 84 and 48.
Divisors of 84 : 1 , 2 , 3 , 4 , 6 , 7 , 12 , 14 , 21 , 28 , 42, 84
Divisors of 48 : 1, 2, 3, 4, 6, 8, 12, 16, 24, 48
We find that the underlined factors 1, 2, 3, 4, 6, 12 are present in both groups. They are called common divisors.
Of these common divisors 1, 2, 3, 4, 6, 12 the biggest divisor is 12.
It is called the greatest common divisor or the GCD for short. It is also called highest common factor or HCF.
view the examples:
Find the GCD :
120, 96
