Enter GCF or LCM numbers:

Number 1Number 2(Optional) Enter Number 3
            

Answer
Success!
3

↓Steps Explained:↓

Determine GCF(3,21)

GCF = Largest factor that divides numbers

Determine the factors for 3

1,3

Determine the factors for 21

1,3

List the common factors

1,3

GCF(3,21) = 3

Evaluate GCF

Since GCF ≠ 1, they are not relatively prime (co-prime)

Since GCF ≠ 1 and have a difference of two, the numbers are not twin prime

Take the Quiz  Switch to Chat Mode


Related Calculators:  Divisibility  |  Partial Quotient  |  Modulus