A sum of money placed at compound interest doubles itself in $4$ $years$. In how many $years$ will it amount to four times itself?
$12$
$13$
$8$
$16$
If the compound interest on a certain sum of money for $3$ years at $5 \,%$ p.a. is $Rs. 504.40$ , find the corresponding simple interest. (In $Rs.$)
The difference between the compound interest and the simple interest on ₹ $8000$ for $3$ years at $5 \%$ per annum is (In ₹)
The simple interest accrued on an amount of $Rs. 19800$ at the end of $3$ years is $Rs. 7128$. What would be the compound interest (In $Rs.$) accrued on the same amount at the same rate in the same period?
The compound interest (In ₹) on ₹ $12000$ for $9$ months at $20 \%$ per annum, interest being compounded quarterly, is
If the compound interest on a certain sum for $2$ $years$ at $3 \%$ per annum is $Rs. 101.50$ , then the simple interest (In $Rs.$) on the same sum at the same rate and for the same time will be