Question 339971
First, what are 3 consecutive numbers that are either
equal to or slightly less than 1000?
Call the numbers {{{n}}},{{{n+1}}},{{{n+2}}}.
{{{n + n + 1 + n + 2 = 3n + 3}}}
{{{3n + 3 = 1000}}}
{{{3*(n + 1) = 1000}}}
{{{n + 1 = 333.33}}}
{{{n = 332.33}}}
With {{{n = 332}}}, the consecutive numbers would be
{{{332}}}, {{{333}}}, and {{{334}}} 
{{{332 + 333 + 334 = 999}}}
This is less than {{{1000}}}. The next 3 consecutive numbers
that exceeds {{{1000}}} is
{{{333}}}, {{{334}}}, and {{{335}}}