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IGBO LANGUAGE | A Class In Mathematics II

We are still on Igbo numbering system.

The previous class was on the decimal counting system of NdịIgbo, id est base 10.

Today’s class explains the vigecimal traditional system on base 20.

I was also taught the base 20 system.

It is used in everyday counting, especially among elders and others proficient in Igbo language.

As always, what I present here is original, authentic, and ancient Igbo counting.

In the base 20 system, the first nineteen numbers are the same as in the decimal system.

Mathematical Terms.

20 Ọgụ
21 Ọgụ na otu
29 Ọgụ na iteolu
39 Ọgụ na iri na iteolu Bere otu n’ọgụ abụọ [or, Bere otu n’ụnọ, where ụnọ = 40]
49 Ọgụ abụọ na iteolu
59 Ọgụ abụọ na iri na iteolu Bere otu n’ọgụ atọ
69 Ọgụ atọ na iteolu
79 Ọgụ atọ na iri na iteolu Bere otu n’ọgụ anọ
89 Ọgụ anọ na iteolu
99 Ọgụ anọ na iri na iteolu Bere otu n’ọgụ ise
100 Ọgụ ise
109 Ọgụ ise na iteolu
119 Ọgụ ise na iri na iteolu Bere otu n’ọgụ isii
199 Ọgụ iteolu na iri na iteolu Bere otu n’ọgụ iri
200 Ọgụ iri [or, ụkara nnụ]
299 Ọgụ iri na ọgụ anọ na iri na iteolu Bere ọgụ ise na otu n’nnụ
400 Nnụ [or, Ọgụ kwụrụ ọgụ]
999 Nnụ abụọ na ọgụ iteolu na iri na iteolu Bere otu n’nnụ abụọ na ọgụ iri
1,000 Nnụ abụọ na ọgụ iri [or, nnụ abụọ na ụkara nnụ]
1,999 Nnụ anọ na ụkara nnụ na ọgụ iteolu na iri na iteolu Bere otu n’nnụ ise
2,400 Nnụ isii
8,000 Ọgụ nnụ
10,000 Ọgụ nnụ na nnụ ise
10,999 Ọgụ nnụ na nnụ asaa na ọgụ iteolu na iri na iteolu
16,000 Ọgụ nnụ abụọ
24,000 Ọgụ nnụ atọ
160,000 Nnụ kwụrụ nnụ

IGBO A represents the forward or addition numbering system.

IGBO B signifies the deduction or subtraction ~ibere numbering system, where one subtracts ~bere a figure from another number.

For readers yet to decipher its significance, ụkara means a half [of].

Tricky Questions.
What are:

  • 206;
  • 320;
  • 1205;

in traditional base 20 edemede Igbo?

What are:

  • 64,000,000
  • 60,000,004

in revised base 10 edemede Igbo?


  • 206 = Ọgụ iri na isii;
  • 320 = Ọgụ iri na ọgụ isii;
  • 1205 = Nnụ atọ na ise.


  • 64,000,000 = Nde iri isii na nde anọ;
  • 60,000,004 = Nde iri isii na anọ.

Note 18,000 = Ọgụ nnụ abụọ na nnụ ise [(20*400*2)+(400*5)].

Can 18,000 be nnụ ọgụ abụọ na ise, id est, [(nnụ) (ọgụ abụọ na ise) or 400*45]?

No, it can not be.

Nnụ ọgụ abụọ na ise = [(400*20*2)+5] = 16,005.

Wherever ọgụ occurs as a major multiplier, it ought to be stated first, followed by other numerals.


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This entry was posted on 2017, Wed+01:002019-10-02T06:00:00+01:00+01:0010b+01:00Wed, 02 Oct 2019 06:00:00 +0100 31 by in Beautiful Children, E-Learning Expert, Education For All, Young Brilliance and tagged , , .


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Love from an Amawụ of Ọtampa and Ụmụasụa in Ìsúíkwúàtọ̀, Nigeria.

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