<PRE><B>Question 23280</B>
Factor each number into primes:
12=3*4 
12=2^2*3


22= 2*11


GCF = Product of all common factors = 2


7= 7 (Prime)
21 = 3*7


GCF = Product of all common factors = 7


24 and 48

Because 24 divides into 48 evenly, this means that 24 is the GCF without going to all the trouble of factoring the numbers into primes.  If you did factor, the result would be 24.


R^2 at SCC

</PRE>