Prefixes Assigning Number Value:
Number Latin Prefix Greek Prefix Examples
1 Uni Mono Unilateral, monochromatic
2 Duo, Bi Dyo Duet, bilateral,dyad
3 Tri Tri Trio, triathlon
4 Quadri, Quadro Tetr, Tetra Quadruplet, tetroxide
5 Quinqu, quint Pent, penta Quintet, pentagon
6 Sex Hex, hexa Sexennial, hexose, hexagon
7 Sept, septi Hept, hepta Septuple, heptarchy
8 Octo Oct, octa, octo Octave, octopus
9 Novem, nonus Ennea Nonuple, ennead