instruction:
In this task, you need to provide the correct option for a given problem from the provided options.
question:
Problem: if m = 3 ^ n , what is the greatest value of n for which m is a factor of 28 ! 
Options: a ) 13 , b ) 10 , c ) 12 , d ) 14 , e ) 16
answer:
a


question:
Problem: 99 ! how many zero ' s ? 
Options: a ) 20 , b ) 21 , c ) 22 , d ) 23 , e ) 24
answer:
c


question:
Problem: what is the units digit of 32 ! + 50 ! + 4 ! + 4 ! ? 
Options: a ) 0 , b ) 2 , c ) 4 , d ) 6 , e ) 8
answer:

e