Question 566618
If the letters can be repeated but no two numbers can be the same
{{{ 26*26*10*9*8*7 = 3407040 }}}
if repetitions of numbers and letters are allowed except no plate can have 4 zeros
{{{ 26*26*10*10*10*10 - 26*26 }}}
{{{ 26*26*(10000 - 1 ) }}}
{{{ 26*26*9999 = 6759324}}}