Question 467510
The highest order digit should be the largest
number.
So far you have {{{ 8*100000 }}}
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The next higher order digit should be the next 
highest number.
So far you have {{{ 8*100000 + 7*10000 }}}
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The next higher order digit should be the next 
highest number.
So far you have {{{ 8*100000 + 7*10000 + 5*1000 }}}
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The next higher order digit should be the next 
highest number.
So far you have {{{ 8*100000 + 7*10000 + 5*1000 + 2*100 }}}
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The remaining numbers are {{{0}}} and {{{1}}}
The lowest order digit must be {{{0}}} to make the number even
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Finally you have
{{{ 8*100000 + 7*10000 + 5*1000 + 2*100 + 1*10 + 0*1 }}}
The number is {{{ 875210 }}}