A sum of money at simple interest amounts to Rs 815 in 3 years and to Rs 854 in 4 years. The sum is (a) Rs 650        (b) Rs 690       (c) Rs 698      (d) Rs 700

A sum of money at simple interest amounts to Rs 800 in 2 years and to Rs 1200 in 6 years. The sum is……………

A sum of money invested at compound interest amounts to Rs 4624 in 2 years and to Rs 4913 in 3 years.The sum of money is: (a) Rs 4096 (b) Rs4260 (c) Rs 4335 (d) Rs 4360