Each of the numbers has a partner with whom it shares its digits (they are anagrams of eachother)...all those being EVENLY paired we are left with an ODD one out:
6394
!BEER
!ENGAGE
Comment 49/500
Each of the numbers has a partner with whom it shares its digits (they are anagrams of eachother)...all those being EVENLY paired we are left with an ODD one out:
6394
!BEER
!ENGAGE
Comment 49/500