Numerology in India is not very popular as astrology. Astrology is something which has been followed by the Hindus since ages. As astrology is a science related to the planetary positions, so also is numerology. It is a fact that there are only nine planets in our solar system, similarly there are only nine numbers by which all our calculations on this earth are made. Beyond these numbers all the rest are repetitions , as 10 is a 1 with a 0 added, an 11 is 1 plus 1, a 2 and so on.
The secret underlying the whole of this idea is that of the mysterious law of vibration. The day of birth giving a key number that is related to the planet bearing the same number, this representing a vibration that lasts all through your life, and which may, or may not, be in accord with the Name Number and with the vibrations of individuals with whom we are brought into contact.