In real numerology, numbers are added together to form a single digit number that might have significance. The sum should never exceed 9, except for the "master" numbers 11 and 22. This is in accordance to the nine personality types, the nine planets in the solar system, and many other things. For example, Walter's room at the asylum was 318. When calculated in the movie it is suppose to equal 23, 31-8=23. However in real numerology the number would be added as 3+1+8, equaling 12. The sum would then be added again to create a single digit, 1+2 = 3. 3 would be the significant number here, and there are many sources on the Internet or in various numerology books that would define what significance that number would hold for the individual. As another example, the address of the bookstore would have more credibility as their sum does equal 23 (5+9+9=23). But another step would need to be taken to convert the sum into a single digit (2+3 = 5). Finally, birthdays and other notable dates in numerology are always factored with the year. Following the formula of February 3 (2/3 = 23) would be inaccurate. But December 12, 1975 (12/12/1975 = 1+2+1+2+1+9+7+5 = 28 = 2+8 = 10 = 1+0 = 1. Therefore, for a person born on this date, the number 1 should be the most significant.