Prefixes assigning number value

one

Latin: uni
Greek: mono

two

Latin: Duo
Greek: Di

three

latin: Tri
Greek: Tri

four

Latin: Quadri, quadro
Greek: Tetr-, tetra-

five

Latin: Quintu
Greek: Pent, penta

six

Latin: sex
Greek: Hex, hexa

seven

latin: Sept, septi
Greek: Hept, hepta

eight

latin: Octo
Greek: Oct, octa, octo

Nine

Latin: Novem, nonus
Greek: ennea

ten

Latin: Deca, Decem
Greek: Dek, deka