Greek numerals are a decimal system that uses letters of the Greek alphabet to represent numbers. Known as Ionian or alphabetic numerals, this system was adopted around the 4th century BC.
Letters are assigned values from 1 to 9 (units), 10 to 90 (tens), and 100 to 900 (hundreds). A special mark (´, keraia) is placed after the number. Thousands are indicated by a subscript mark (͵) before the units letter.
(α=1, β=2, γ=3, δ=4, ε=5, ϛ=6, ζ=7, η=8, θ=9)
(ι=10, κ=20, λ=30, μ=40, ν=50, ξ=60, ο=70, π=80, ϟ=90)
(ρ=100, σ=200, τ=300, υ=400, φ=500, χ=600, ψ=700, ω=800, ϡ=900)