Question
A man invested a certain amount of sum at 12.5% per
annum simple interest and earned an interest of Rs.2500 after 5 years. If the same amount is invested at 10% per annum compound interest, compounded annually for two years, then find the interest.Solution
Let the certain sum of money be Rs.P. So,  P x 0.125 x 5 = 2500 => P = Rs.4000 Desired interest = [(1.1)2 – 1] x 4000 = Rs.840
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
99.99% of 9.99 + 299.98% of 129.98 = ?2Â
456.9 + 328.10 - 122.98 = ? + 232.11
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
The average marks of 15 candidates were reported as 84. However, it was later discovered that the marks of three candidates were ...
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
15.15% of (150.50 + 249.50) + 8.08³ - (10.10 of 5.05) = ? of (75.75 - 25.25)

A motor boat goes downstream from point A to B ,which is 36 km away from point A, and then returns to A. If actual speed of the boat in still water is 7...