try this one... its simple though

you have to guess the house number from the following clues:

1) if the house number is a multiple of 3 , then it is a number from 50 through 59.
2) if the house number is not a multiple of 4 , then it is a number from 60 through 69.
3) if the house number is not a multiple of 6 , then it is a number from 70 through 79.

so what is the house number being talked about?