| 底 | dǐ shù | (math.) radix; base | 
| 底 | de | (equivalent to 的 as possessive particle) | 
| 底 | dǐ | bottom; base / background; foundation / copy (of a manuscript or receipt etc) kept as a record / (suffix) end of a year or month / (math.) radix; base (abbr. for 底数) | 
| 数 | shǔ | to count / to count as; to regard as / to enumerate; to list | 
| 数 | shù | number; figure / several; a few | 
| 数 | shuò | (literary) frequently; repeatedly |