Vrijeme: 21:52
Strogo zabranjeno korištenje kalkulatora | The use of calculators is strictly forbidden #5
Prirodni broj nazivamo
-krakim za
ako se može zapisati kao zbroj
-tih potencija svojih znamenki. Na primjer,
je
-kraki broj jer je
, dok je
-kraki broj za svaki
.
Koji je zbroj svih
-krakih brojeva?








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Koji je zbroj svih

We say a natural number is
-pointed for
if it can be written as the sum of
powers of its digits. For example,
is a
-pointed number as
, while
is an
-pointed number for every
.
What is the sum of all
-pointed numbers?









What is the sum of all
