කටපයාදිය, n. (ක, ට, ප, ය, ආදිය). A mnemonic system of letters nsed as numerals, කටපය being the first column, thus: 1 2 3 4 5 6 7 8 9 0 ක ඛ ග ඝ ඬ ච ඡ ජ ඣ ඤ ට ඨ ඩ ඪ ණ ත ථ ද ධ න ප ඵ බ භ ම ය ර ල ව ශ ෂ ස හ ළ. Each letter in each column represents the figure under which it is placed. The above consonants must in reading be vocalized with vowels, though the vowels count for nothing. E. g., ගජකම, reading backwards=5 1 8 3.