Numbers considered unlucky:
#4 (Sei) the worst number, why? Because in Cantonese when spoken sounds like the word death.
#13 because if you add 1=3 = 4 as above.
#24 #104 are also considered unlucky
Numbers considered lucky
8, 18, 28, 38, 48, 54, 68, 80, 84, 88, 99, 168 & 108 are all good numbers, the reason #8 is so lucky is because if you say the word (patt) it sounds like "faat" which means "prosperity & abundance"
There are many other numbers I have read about that are considered unlucky in my opinion this is "cannon fodder" and just written about to fill books, if you think about it you could go on for ages, #4 when spoken in English sounds like door, more, store, bore, jaw, paw and "SAW" which out of all of these sounds the worst
If you own a home or business with a 4 or 13 is to draw a circle around the number, seriously it is that simple. The circle is extremely powerful and encloses the inauspicious effects of a negative number. So if you have a house number 4, a cheap way of curing is to go outside and draw a circle around your number or if you have time and money pop down to your local hardware store and find one of those ceramic door numbers that you can customise with a circle around the number, all this time you were worrying about nothing.