What is the greatest number which can be made using each of the digits 5,3,1,4,7
That is tricky but I multiplied them all and got 420 I hope that helps. :)
just start with the biggest number to the smallest
order from largest to samllest
7,5,4,3,1
the number is 75,431
if you wanted to use other things
\(431^{75}\) would be pretty big
but 75,431! would be large as well