| MAPREFERENCES | Sets of numbers and letters specifying locations on cartographical charts - TQ319815, for example, for London's St Bart's and NT231724 for the home of Midlothian's Hearts (3,10) |
| BARCODE | A set of numbers and parallel lines printed on products in shops that can be read by computer (3,4) |
| AT | Specifying location |
| GRID | Pattern of squares on which to write answers to crossword clues; or, linked with "reference", a series of numbers and letters indicating the locations of places on a map (4) |
| ALGEBRA | A large 'B' changed in mathematical system of numbers and letters (7) |
| CHARACTERSTRING | Protagonist could be tied up when shown sequence of numbers and letters |
| POSTCODE | It has letters on numbers and letters on letters |
| INTEGER | Any member of the set of numbers consisting of the natural numbers, their negatives and zero (7) |
| COORDINATE | A set of numbers used in specifying the location of a point on a line or surface or in space (2,8) |
| NUMEROLOGY | The study of numbers and of their supposed influence on human affairs |
| ARITHMETIC | Branch of mathematics that deals with the study of numbers and operations on them (10) |
| SIXESANDSEVENS | Disorderly state of consecutive sets of numbers (5,3,6) |
| LANDSEND | One of the main locations on the route of a LEJOG or JOGLE event which is the most south-westerly point of mainland Britain (5,3) |
| MOHSSCALE | A set of numbers for expressing the hardness of solids (4,5) |
| MEAN | 3.5, for the set of numbers on a die |
| DATAMINING | Automated analysis of huge sets of numbers |
| GRAPHS | Mathematical diagrams that show the relationship between sets of numbers (6) |
| YELLOW | One of the colours of the counters used in Connect Four, pieces/tokens in Ludo, wedges inA Trivial Pursuit or locations on a Monopoly board (6) |
| MARYLEBONE | One of the rail station locations on a London Monopoly board (10) |
| ALPHANUMERIC | Consisting of both numbers and letters (12) |
