My two friends live on the same street. Oddy lives on the odd side of the street, and Evelyn lives on the even side.

Just looking at the houses on the odd side, the sum of all the houses below Oddy’s house (1+3+5 etc) is exactly a quarter of the sum of the house numbers above Oddy’s house on the odd side.

Looking at the even side, the sum of the house numbers below Evelyn’s house (2+4+6 etc) is exactly double the sum of the house numbers above Evelyn’s house on the even side.

How many houses are there on Oddy’s and Evelyn’s street?