1. uni- (Latin) unicorn, unicycle, uniform, universe
   mono- (Greek) monochrome, monocycle, monogram, monopoly, monologue
   
   
2. bi- (Latin) biannual, biceps, bicycle, biennial, bifocals, bipolar
   duo- (Latin) dual, duet, duality, duologue, dualism
   di- (Greek) digraph, diode, dioxide, dipole, dichromatic
   
   
3. tri- (Latin/Greek) triangle, tricycle, tripod, triplicate, triceratops
   ter- (Latin) tertiary, tercet, tercentennial, tercentenary
   
   
4. quadr-, quar-
   (Latin) quadrangle, quart, quartile, quartet, quadruplets
   tetra- (Greek) tetragon, tetracycline, tetragonal, tetrahedron, tetrameter
   
   
5. quint- (Latin) quintet, quintile, quintuple, quintuplets
   pent- (Greek) pentagon, pentadactyl, pentameter, pentarchy, pentathlon
   
   
6. sex- (Latin) sextet, sextant, sextuple, sextuplets
   hex- (Greek) hexagon, hexagonal, hexagram, hexahedron, hexadecimal
   
   
7. sept-(Latin) September, septet, septilateral, septuagenarian
   hept- (Greek) heptagon, heptagonal, heptameter, heptarchy
   
   
8. octa-, octo-
   (Latin/Greek) octopus, octagon, octet, octogenarian, octagonal, October
   
   
9. nona-, nove-
   (Latin) nonagon, nonagonal, nonagenarian, November, novena
   
   
10. dec-, deca-, deci-
    (Latin/Greek) decade, decagon, decathlon, December, decigram,
    decimal, decimate, decimeter

100                cent- (Latin) century, centennial, centenary, centigram, centigrade, centipede
                      hect- (Greek) hectare, hectogram, hectometer

1000               mille- (Latin) millennial, millennium, million, millipede
                       kilo- (Greek) kilobyte, kiloliter, kilowatt, kilogram, kilometer

10,000            myria (Greek) myriad, myriameter

million              mega- (Greek, also means large) megabyte, megameter, megawatt
billion               giga- (Greek) gigabyte, gigacycle, gigahertz, gigameter
trillion               tera- (Greek) terahertz, teramet
quadrillion         peta- (Greek) pentameter
quintillion          exa- (Greek) exameter