# Find the last two digits

#### Albert

##### Well-known member
n is an odd positive integer number please find the last two digits of :

$2^{2n}(2^{2n+1}-1)$ (in decimal notation)

Last edited:

#### chisigma

##### Well-known member
Please... doe's the number written in binary or decimal notation?...

Kind regards

$\chi$ $\sigma$

decimal