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The Ishango bone is a tally stick, made of bone, which contains sequences of prime numbers, and some series of multiples. The bone was found in the area of the headwaters of the Nile River. The bone has three rows of notches, with the row a) below having 2 sets of numbers in excess-one format, base 10: 9,19, 21,11. Row b) is a descending series of prime numbers from 19; row c) continues the series of prime numbers, down to 5; row c) then contains multiples of 3, 4 and 5, in an example of Egyptian multiplication. Tally sticks are an ancient mnemonic device (memory aid) to record and document numbers or quantities even messages. ...
Grays illustration of a human femur, a typically recognized bone. ...
In mathematics, a prime number (or a prime) is a natural number that has two distinct positive divisors, one and itself. ...
There is also Nile, a death metal band from South Carolina, USA. The Nile in Egypt Length 6 695 km Elevation of the source 1 134 m Average discharge 2 830 m³/s Area watershed 3 400 000 km² Origin Africa Mouth the Mediterranean Basin countries Uganda - Sudan - Egypt The...
In mathematics, a prime number (or a prime) is a natural number that has two distinct positive divisors, one and itself. ...
Peasant multiplication is an old algorithm for multiplication. ...
- Rows of tally notches below:
| (a) | 9 | 19 | 21 | 11 | | (b) | 19 | 17 | 13 | 11 | | (c) | 7 | 5 | 5 | 10 | 8 | 4 | 6 | 3 | Originally from Africa, this artifact now resides at the Royal Belgian Institute of Natural Sciences, Brussels, Belgium. The bone is dated from around 6,500 BC. Tally may refer to Tally stick Tally marks Tally (voting) Tally (accounting) A commercial accounting software package very populour in India. ...
A satellite composite image of Africa Africa is the worlds second-largest and second most populous continent, after Asia. ...
The Royal Belgian Institute of Natural Sciences is a museum in the Belgian capital of Brussels dedicated to natural history. ...
Emblem of the Brussels-Capital Region Flag of The City of Brussels Brussels (French: Bruxelles, pronounced in Belgian French and in International French; Dutch: Brussel; German: Brüssel) is the capital of Belgium, the French community of Belgium, the Flemish community and one of the three capitals of the European...
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