This number is represented by a triangle, with its three sides representing force, matter and consciousness. The triangle also stands for manifestation and procreation of life. In Hinduism, Tantras, the triangle, is treated as a holy symbol of the Supreme power. This number is presided over by Jupiter, who, in Roman mythology, is the king of gods. Number 3 represents good mental ability and sound judgement. It stands for accepted customs and rituals, orthodoxy and religiousness. A pleasing personality and popularity are its other attributes.
When Jupiter is weak at the time of birth, the negative qualities of this number manifest themselves. These are pessimism, laziness and extravagance. Jupiter, in a birth chart, is deemed strong if the date of birth is the 3rd, 12th, 21st, or 30th, and falls on a Thursday; if the birthday falls between November 23 and December 21, or between February 19 and March 21; and; particularly, if born in the planetary hour of Jupiter. This is so as Jupiter is the ruling planet of Sagittarius (November 23- December 21) and Pisces (February 19- March 21).
Number 3 people are ambitious, and destined to rise high in life. They are good disciplinarians, and love order and arrangement. They cope well with the duties and responsibilities of high office. They are, however, dominating and, as a result, apt to create enemies.