Why Do People Consider 7 To Be Lucky And 13 To Be Unlucky ?
Seven is the number of Heaven, home of God. The ancients imagined that the heavens were divided into seven layers : Sun, Moon, and the five visible planets Mars, Mercury, Jupiter, Venus, Saturn. The seven days of the week are based on these.
So seven=heaven=holy=lucky.
Unlucky 13 is based on a passage from the Bible. The 13th seat at the Last Supper belonged to Judas the Betrayer of Christ. So 13 came to be regarded as an inauspicious number.
There may have also been an ancient Greek influence, since their 13th major god was Hades king of the dead (the other 12 were the gods of heaven). They also had a 13th leap month which was interposed into the calendar every few years in mid winter and which was regarded as sacred to the dead, so somewhat unlucky in superstition.

January 26th, 2010 at 1:40 pm
There are a lot of reasons for 13 being considered unlucky.
The 13th guest of the last supper was Judas.
On Friday the 13th, the Knights Templar where rounded up and arrested and tortured.
In Norse Mythology there is a similar story to the last supper but Loki is the 13th guest.
The number 7 is referenced in the bible a lot as a power and protective number.
Greeks considered it the ‘perfect number’.
There’s a lot of info out there on both numbers.
January 26th, 2010 at 1:40 pm
Judus was the 13th Disciple the one that betrayed God.
God Created the Heavens in 7 day and on the 7th day he rested making it a Great number also 7 represents completion.
EDIT:
@Ryan if Marujania begins with M and its bad luck so is….Marriage and Money because they begin with M
January 26th, 2010 at 1:40 pm
Over the years people just believe they are unlucky and lucky even though luck is what you believe it is. Such as if you think of all the bad things that happened and non of the good than you will trick yourself into believing that you have bad luck.
January 26th, 2010 at 1:40 pm
7 is lucky because it’s the most likely in dice and 13 is unlucky because m is the thirteenth letter of the alphabet and it used to symbolize marijuana so people said it was bad luck hiding what it really meant
January 26th, 2010 at 1:40 pm
not sure about the seven,but 13 is supposed to be unlucky because that is the number of witches in a coven, but i think it might go back to even deeper origins
January 26th, 2010 at 1:40 pm
13 became unlucky when the Knights Templar were assassinated on Friday the 13th
January 26th, 2010 at 1:40 pm
Ha. 7, 13, and any number are no deal.
But zero is unlucky because you are NOTHING!
January 26th, 2010 at 1:40 pm
13 is lucky if you arent religious
January 26th, 2010 at 1:40 pm
13 was meant to be the number of people at the table of the last supper i think
January 26th, 2010 at 1:40 pm
13 was a very lucky number for my husband when we went to Vegas. We won a lot of money because of this number!
January 26th, 2010 at 1:40 pm
I used to know about 7….but 13 is NOT an unlucky number. I don’t care who says it is…….it is not.
January 26th, 2010 at 1:40 pm
8 is unlucky if you are Chinese.
January 26th, 2010 at 1:40 pm
7 sounds nicer
January 26th, 2010 at 1:40 pm
In Christianity 7 is God Rest . And ours.
GOD BLESS
13 means nothing special.
January 26th, 2010 at 1:40 pm
I was born on the 13th, i consider it very lucky!
January 26th, 2010 at 1:40 pm
old wives tales 13 is luck for a lot of folk and lucky 7
January 26th, 2010 at 1:40 pm
i honestly do not know!