**Missing
letters? Missing numbers?**

Stigma aka Digamma ($=
6) Koppa (& =90) Sampsi ("
=900)

**The
Greek Alphabet**

The
Greek letters were 24 and the required number,27, was made up by using
the final "s" or $(called
Stigma) for 6, and adding two arbitrary symbols called respectively
Koppa, for 90, and Sampsi, for 900.

Alpha=1 |
Iota=10 |
Rho=100 |

Beta=2 |
Kappa=20 |
Sigma=200 |

Gamma=3 |
Lambda=30 |
Tau=300 |

Delta=4 |
Mu=40 |
Upsilon=400 |

Epsilon=5 |
Nu=50 |
Phi=500 |

Stigma=6 |
Xi=60 |
Chi=600 |

Zeta=7 |
Omicron=70 |
Psi=700 |

Eta=8 |
Pi=80 |
Omega=800 |

Theta=9 |
Koppa=90 |
Sampsi=900 |