SOLUTION: Find the GCF of 21 and 55. Please show work

Algebra ->  Numeric Fractions Calculators, Lesson and Practice -> SOLUTION: Find the GCF of 21 and 55. Please show work      Log On


   

Question 51007This question is from textbook Prealgebra
: Find the GCF of 21 and 55. Please show work This question is from textbook Prealgebra

Answer by AnlytcPhil(1806) About Me  (Show Source):
You can put this solution on YOUR website!

Find the GCF of 21 and 55. Please show work

Break 21 and 55 down to prime factors

21 = (3)(7)
55 = (5)(11)

We don't see any common factors at all. However, 1 is
ALWAYS a common factor of ANY two integers, and if
there are no other factors in common, then the answer
is GCF = 1

So the answer is GCF = 1

Edwin