Question 508955
The ten-thousands digit is {{{5}}}
The thousands digit is either {{{0}}} or {{{1}}}
The tens digit is {{{2}}}
So far, I have either
50a2b or
51a2b
In the 1st case,  {{{ 5 + 0 + a + 2 + b = 23 }}}
{{{ a + b = 16 }}}
In the 2nd case, {{{ 5 + 1 + a + 2 + b = 23 }}}
{{{ a + b = 17 }}}
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