AVG and SUM functions only work on numeric data types. They cannot be applied to text, date, or other non-numeric data types. Attempting to use them on strings or dates will result in an error.
AVG and SUM are aggregate functions restricted to numeric column types (like NUMBER); they can't be applied to arbitrary numeric-looking or date/character data without explicit conversion. So the blanket claim that they work "for any numeric data" overstates their applicability, making the statement false.