If the compound interest on a certain sum for 2 years at 10% per annum is Rs 1050, the sum is

If the difference between simple interest and compound interest on a certain sum of money for 3 yr at 10% per annum is Rs 31, the sum is -

The compound interest on a certain sum for 2 years at 10% per annum is Rs 525. The simple interest on the same sum for double the time at half the rate percent per annum is (a) Rs 400 (b) Rs 500 (c) Rs 600 (d) Rs 800

The compound interest on a certain sum of money for 2 years at 10% per annum is Rs 525. The simple interest on the same sum of money for double the time at half the rate percent per annum is? (a) Rs 1000 (b) Rs 500 (c) Rs 200 (d) Rs 800

The comound interest on a certain sum for 2 years at 10% per annum is 1260. The simple interest on the same sum for double the time at half the rate per cent per annum is