Find the GCF if the LCM of 10 and 20 is 20. Answer:
LCM x GCF = Product of Numbers GCF = Product of NumbersLCM = 10 x 2020 = 200/20
GCF = 10
Find GCF from LCM calculator that shows work to find the greatest common factor of two numbers. The step-by-step calculation help parents to assist their kids studying 4th, 5th or 6th grade to verify the work and answers of greatest common factor from LCM homework and assignment problems in pre-algebra or in number system (NS) of common core state standards (CCSS) for mathematics.