What is difference between $C.I.$ and $S.I.$ of $Rs. 12000$ on $5 \%$ per annum for $2$ years?

What will be the amount (In ₹) if a sum of ₹ $5000$ is placed at compound interest for $3$ years while rate of interest for the first, second and third years is $2,3$ and $4$ per cent, respectively?

The compound interest on a certain sum for $2$ years at $12 \%$ per annum, compounded annually is $Rs. 1272$. The simple interest (In $Rs.$) for that sum at the same rate and for the same period will be?

The difference between the compound interest and simple interest on a certain sum at $3 \%$ per annum for $3$ years is ₹ $27.27 .$ The sum is (In ₹)

The compound interest (In ₹) on ₹ $12000$ for $9$ months at $20 \%$ per annum, interest being compounded quarterly, is

Which of the statement given below are sufficient to answer the following question.

What is the rate of interest $p.c.p.a.$ on the amount of $Rs. 15000$ taking loan?

($I$) The difference between $C.I. \& S.I.$ is $Rs. 170$

($II$) The $S.I.$ of $2$ years is $Rs. 2500$