NSC gives 8% PA compounded twice a year. This means Rs. 100 will give you Rs. 160.1032 at the end of the tenure. You can use this to extrapolate to all denominations!

The formula is: Final value = Principal * ( ( 1 (interest rate / number of times interest is compounded)) ^ ( period in years * number of times interest is compounded))
For example: Final value = 100 * ((1 (0.08 / 2))^(6*2)