₹ $3757$ is to be divided between $A$ and $B$ such that $A's$ share at the end of $7$ years may be equal to $B$ 's share at the end of $9$ years. If rate per cent be $10 \%$ p.a. compound interest, $B$ 's share is (In ₹) 

A sum of ₹ $15000$ deposited at compound interest becomes double after $5$ $years.$ After $20$ $years$, it will become (In ₹)

If a sum of money compounded annually becomes $1.44$ times of itself in $2$ years, then the rate of interest per annum (In $\%$) is

The compound interest on a certain sum for $2$ years at $10 \%$ per annum is ₹ $525 .$ The simple interest (In ₹) on the same sum for double the time at half the rate percent per annum is

A sum of money is paid back in two annual instalments of ₹ $17,640$ each, allowing $5 \%$ compound interest compounded annually. The sum borrowed was (In ₹)