Thirteen is regarded as an unlucky number in many cultures especially in the west.
Thirteen may be considered a “bad” number simply because it is one more than 12, which is a popularly used number in many cultures (possibly due to it being a highly composite number). When a group of 13 objects or persons is divided into two, three, four or six equal groups, there is always one leftover, “unlucky” object or person
See more about why number 13 is unlucky here.
Oppositely,thirteen means lucky in China,expecially in Guangdong province.For 13 has the same sound with “实生”,it means you will definitely be good.Differently,fourteen is regarded as unlucky number,for it has the same sound with”实死”,it means you will die!
Due to it, some tall buildings have resorted to skipping the “fourteenth floor”, either by numbering it “15″ (though it’s really still the fourteenth floor) or by designating the floor as “13a” or something similar. Similarly, some streets do not contain a house number 14.So,in the floor of my office,number 14 is not exist.
