A scooter was bought at Rs 42,000. Its value depreciated at the rate of 8% per annum. Find its value after one year.

In a laboratory, the count of bacteria in a certain experiment was increasing at the rate of 2.5% per hour. Find the bacteria at the end of 2 hours if the count was initially 5,06,000.

The population of a place increased to 54000 in 2003 at a rate of 5% per annum

(i) find the population in 2001

(ii) what would be its population in 2005?

Find the amount which Ram will get on Rs 4,096, he gave it for 18 months at \(12 \dfrac{1}{2}\%\) per annum, interest being compounded half yearly.

Find the amount and the compound interest on Rs 10,000 forĀ \( 1\dfrac{1}{2}\)years at 10% per annum, compounded half yearly. Would this interest be more than the interest he would get if it was compounded annually?