TNPSC Group IV · Aptitude and Mental Ability Test
Interest, principal, rate and time problems.
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Q1 · Simple and Compound Interest · EASY
A sum of Rs. 8000 is invested at 10% simple interest per annum. What is the interest earned after 3 years?
Q2 · Simple and Compound Interest · EASY
What principal amount will yield a simple interest of Rs. 1200 in 4 years at the rate of 5% per annum?
Q3 · Simple and Compound Interest · MEDIUM
A sum of Rs. 5000 amounts to Rs. 6200 in 2 years at simple interest. What is the rate of interest per annum?
Q4 · Simple and Compound Interest · MEDIUM
A sum of Rs. 10000 is invested at 8% compound interest per annum compounded annually. What will be the amount after 2 years?
Q5 · Simple and Compound Interest · HARD
The difference between compound interest and simple interest on a sum for 2 years at 10% per annum is Rs. 50. What is the principal sum?