What is the GCF of 21 and 63?
GCF of two numbers 21 and 63 is the largest possible number which divides both the numbers exactly.
Answer: GCF of 21 and 63 is 21
Let us see how to find the GCF of 21 and 63
Find GCF of 21 and 63 by Long Division
Divide 63 by 21 and check the remainder. Make the remainder of the above step as the divisor and the divisor of the above step as the dividend and perform the long division again. Continue till you get the remainder as 0
Another perspective of this question is that 21 is itself a factor of 63. So, by the definition of GCF, 21 is the solution for GCF(21, 63).