Question

if a difference between the smallest five digit prefect cube and greatest four digits prefect cube is a then ( a - 56 ) can be cube of

Answer 1

smallest five digit perfect cube 10648 ie cube of 22
greatest four digit perfect cube is 9261 ie cube of 21
Difference is 10648-9261=1387=a
a-56=1387-56=1331 which is perfect cube of 11

Answer 2

smallest five digit perfect cube is 10648
and largest four digit perfect cube is 9261
10648-9261= 1387
1387-56= 1331
=(11)^3