Henry Ernest Dudeney/Modern Puzzles/86 - A New Street Puzzle

by : $86$

 * A New Street Puzzle
 * Brown lived in a street which contained more than twenty houses, but fewer than five hundred,
 * all numbered one, two, three, four, etc., throughout.
 * Brown discovered that all the numbers from one upwards to his own number inclusive summed to exactly half the sum of all the numbers from one up to, and including, the last house.


 * Now what was the number of his house?