Definition:Tally Marks

Definition
Tally marks are a system of recording (usually) small numbers.

For each unit in a given natural number, a mark is made.

Thus, for example, $13$ could be recorded $|||||||||||||$.

It is usual for tally marks to be arranged in groups of $5$, by drawing every fifth line diagonally across the group of $4$ before it.

Thus $13$ would then be recorded:
 * [[File:Tally5.png]][[File:Tally5.png]][[File:Tally3.png]]

Also see

 * Definition:Lebombo Bone
 * Definition:Wolf Bone
 * Definition:Ishango Bone