The disappearance of the two floors is apparently because certain numbers are bad luck or have associations with death among Chinese, who are investing billions of dollars in the Australian property market.
In Mandarin Chinese, the look and sound of the word for 'four' is very similar for the word 'death' - and that could be bad luck.
This superstition is referred to as tetraphobia and is common in East Asian and Southeast Asian regions such as China, Japan, Malaysia and Korea.
The disappearing floors are an example of increasing foreign investment in Australian property.
Tetraphobia is the practice of avoiding instances of the number 4.
Tetraphobia far surpasses triskaidekaphobia (Western superstitions around the number 13). It even permeates the business world in these regions of Asia.
The Chinese avoid phone numbers and addresses with fours, especially when they’re combined with another number that changes the meaning. Example: “94” could be interpreted as being dead for a long time.