Question

HCF of 2781 and 1242

Answer 1

The instructions to find the GCF of 1242 and 2781 are the next:

1. Decompose all numbers into prime factors

124226213207369323231 27813927330931031031

2. Write all numbers as the product of its prime factors

Prime factors of 1242=2 . 33 . 23Prime factors of 2781=33 . 103

3. Choose the common prime factors with the lowest exponent

Common prime factors: 3

Common prime factors with the lowest exponent: 33

4. Calculate the Greatest Common Factor or GCF

Remember, to find the GCF of several numbers you must multiply the common prime factors with the lowest exponent.

GCF = 33 = 27