OOP:Houses

[eyen_paune]

No: HPFGUIDX 65940

Just a quick question...Was it ever mentioned in any of the books 
which house Tom Riddle belonged to? I know he was the heir of 
Slytherin so it's quite natural to assume that he was sorted into 
that house.

However, Slytherins only take in purebloods & we all know that Tom 
Riddle is not a pure wizard.

So I ask again...which house does Tom Riddle really belong to??? Ü