RBI has issued Rs 100 denomination banknotes in Mahatma Gandhi Series - 2005 with this type of new numbering pattern.
Now the numerals in both the number panels of these banknotes will be in ascending size from left to right, while the first three alphanumeric characters (prefix) will remain constant in size, RBI said in a release.
"Printing the numerals in ascending size is a visible security feature in the banknotes so that the general public can easily distinguish a counterfeit note from a genuine one," RBI said.
Further, all the banknotes in the denomination of Rs 100 issued by the RBI in the past will continue to be legal tender, it said.
The new numbering pattern will be introduced in a phased manner in all other denominations, RBI said.