The answer is 4
4 is the GCF of 16s^3t, 40s^5 and 68t^2
Find the GCF of 16s^3t, 40s^5 and 68t^2.
GCF is the largest number that divide these numbers.
List the prime factor of 16s^3t, 40s^5 and 68t^2
Common factor of 16s^3t, 40s^5 and 68t^2 is, 2 \cdot 2= 4
Greatest common factor of 16s^3t, 40s^5 and 68t^2 is, 4