Numbers are considered as having mutual affinities which are as described below:

‘1 and 4’, ‘2 and 7’, ‘3,6 and 9’, ‘4 and 8’ are series of numbers which are mutually attractive and 5 being ruled by the mercury is considered to be friendly with all the other numbers. ‘1 and 4’ and ‘2 and 7’ series are again considered interchangeable or have mutual affinity.

Based on the above information, it may be said that such and such a date or number will have significance in a person’s life but whether positive or negative is an important question. Another still more important question is that how will the person fare on other dates or other numbers which do not fall in his series of numbers. To say that all the other dates or numbers will have no significance in a person’s life is impossible. Hence, numerology leaves unanswered the question that how are the numbers related to him.

There are a number of systems allocating a number to every letter of the alphabet, the Pythagorean, Chaldean, Hebraic and modern being the important ones. With the help of this allocation the number of a name can be worked out and it can be seen whether it is in harmony with the birth number or not. This harmony or disharmony is then taken as a measure of the success or failure or the smooth- sailing or a chequered career of the person. Suppose, if a birth number 1 person has name number also as a 1 then it can be taken as an assurance that matters stand harmoniously and good success may accrue to the person. But it has often been observed that two persons with their name and birth number both being 1 and hence in harmony are doing almost opposite types of work and one is quite successful and the other is a wretched failure.