**There was a man who lived on a XXXX street numbered 1,2,3 … etc. on his side and all the following numbers on the other side of him.
The numbers on both sides added to exactly the same amount.
What was the number of the last house? **

I have slightly changed the original wording and also took the liberty of coding a single 4 letter word of his text to avoid getting a trivial solution.

I ask for a solution which is over 45. The upper limit stays open.
So:

a. Provide an answer (or answers) 46 and up.

b. What word was replaced by XXXX?

Bonne chance!