A practical reference guide to the Suri-Ohaeng (수리오행) system — how to determine the elemental identity of any number by its ones digit, and how to use this knowledge for smarter lottery number selection.
The Suri-Ohaeng (수리오행, Numerological Five Elements) system is one of the most practical applications of Korean Saju to everyday number selection. The principle is elegantly simple: every number's elemental identity is determined by its ones digit. This means you do not need to know anything else about a number to classify it — just its final digit. Master this single rule and you can classify any lottery number, phone number, address, or price into its Five Element category in seconds.
The complete mapping is: Water numbers end in 1 or 6 (1, 6, 11, 16, 21, 26, 31, 36, 41). Fire numbers end in 2 or 7 (2, 7, 12, 17, 22, 27, 32, 37, 42). Wood numbers end in 3 or 8 (3, 8, 13, 18, 23, 28, 33, 38, 43). Metal numbers end in 4 or 9 (4, 9, 14, 19, 24, 29, 34, 39, 44). Earth numbers end in 0 or 5 (5, 10, 15, 20, 25, 30, 35, 40, 45). In 로또 6/45, this distributes roughly evenly: 9 Water, 9 Fire, 9 Wood, 9 Metal, and 9 Earth numbers.
The character of each elemental number group carries practical meaning for selection strategy. Water numbers (1·6 endings) are associated with flow, adaptability, intelligence, and hidden depth — in Saju they are linked to the north and the kidneys. Fire numbers (2·7 endings) bring energy, passion, communication, and visibility — linked to the south and the heart. Wood numbers (3·8 endings) represent growth, creativity, and forward movement — linked to the east and the liver. Metal numbers (4·9 endings) carry precision, structure, and clarity — linked to the west and the lungs. Earth numbers (0·5 endings) provide stability, groundedness, and balance — linked to the center and the stomach.
Published: 2026-02-24
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