Thai 7-digit numerology

“Seven numbers, four bases” (lek jet tua si than) is one of the best-known Thai fortune methods. Your birth weekday, month and Thai year animal each start a row of seven numbers counting from 1 to 7 (the seven weekday planets). Each column has its own meaning in each row, and a fourth row adds the three together.

Translated from the Thai edition. The old texts describe a very different society; remarks about deaths, servants, skin colour and sexual matters were removed or rewritten, and many readings were shortened.