In section 'Numerology' all calculations are based on methods and formulas used in Vedic (Indian), Mayan and Chinese numerology, and all that from your personal data. Some calculations are based on formula from only one of these ancient civilization, and some other calculations are combination of methods, techniques and formulas from two or even all three cultures. All formulas are created by team of astrologists and mathematician. For details about every calculation please follow link which you can find on calculations after you confirm your personal data.
Ancient Indians, Mayans and Chinese had different aproaches to numerology and all parts of numerology were not equally studied. So because of that, modern numerology studies take best from each culture for some calculations. But in some cases e.g. lucky 2-digit number there is no quality calculation (because they were thinking that only one-digit number is important which is NOT correct) in any of these cultures so modern numerology find combination of ancient formulas to get good and efficient formula for such an important thing as it's lucky two-digit number.