if the difference of the smallest 5 digit perfect cube & the greatest 4 digit perfect cube is 'a' , then (a-56) canbe cube of :-
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smallest 5 digit perfect cube =22×22×22= 10648
greatest 4 digit perfect cube =21×21×21= 9261
therefore difference =10648-9261=1387
therefore a=1387
therefore (a-56)=1387-56=1331
hence,answer=11
greatest 4 digit perfect cube =21×21×21= 9261
therefore difference =10648-9261=1387
therefore a=1387
therefore (a-56)=1387-56=1331
hence,answer=11
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