Thai people are very superstitious. Odd number are supposed to be lucky numbers. Lottery tickets with odd numbers are likely appreciated. The number "9" is supposed to bring good luck. In Thai language number "nine" is closed to the word "rice" and to the word "to enter".

So it is an important word of luck, food, improvement. For Buddhist ceremonies such as wedding or new shop settlement, nine monks are always invited. The number "9" is an auspicious number. The number "3" is also an important number because three multiplies three is nine. So in old times there were ceremonies for new born babies on the third day and third month of life.

ข้าว or "KHAO" means "rice". เก้า or "KAO" means "nine". เข้า or "KHAO" means "to enter".