Theoretically, to make any date, the dealer will have to keep a stock of 80,000 currency notes. So, if you are using 10 Rupee Note, the dealer will have a stock of notes worth Rs. 8.00 Lacs.

The number of notes can be worked out using simple mathematics (Permutation and Combination).

The first digit can have only (0,1,2,3) - first digit of date

The Second digit can have (0-9) - second digit of date

The Third digit can have only (0 and 1) - the first digit of month

The fourth digit can again have (0-9) - the second digit of month

The fifth digit can have (0-9) - the first digit of year

and the Sixth digit can again have (0-9) - the second digit of year

So, the total number of notes required to make any possible date = 4 X 10 X 2 X 10 X 10 X 10 = 80,000

It is also possible to use 5,20,50, 100, 500 or 1000 rupee notes.

Abhay