Question

what principle will amount to Rupees 9856 in 2 years if the rate of interest for successive years are 10% and 12% respectively.

Answer 1

          112% of x = 9856
          (112/100)(x)=9856
          x=(9856)(100)/112
          x=8800

now 
         110% of x =8800
          (110/100)(x)=8800
         x=(8800)(100)/110
         x=8000

             Hence,principal is = RS8000