# Dd 2-digit numbers

Find all odd 2-digit natural numbers compiled from digits 1; 3; 4; 6; 8 if the digits are not repeated.

Result

n =  8

#### Solution:

$M=41; 43; 61; 63; 81; 83; 13; 31 \ \\ n=3 \cdot \ 2+2=8$

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