Definition:Arabic Numerals/Historical Note/Mistake

Source Work

 * Chapter $2$: Notations and Numbers
 * Indian number symbols
 * Indian number symbols

Mistake

 * The earliest Indian numerals were more like the Egyptian system. For example, Khasrosthi numerals, used from $400$ to  $100$, represented the numbers $1$ to $8$ as ...

The correct name is Kharosthi or related variants.

The symbols given (not reproduced here for lack of capability) do not match anything that can be found online.

It appears that may have misrepresented the nature of the Kharosthi symbols, and interpreted them to signify a $4$-based system.