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.

A sum of Rs 10,000 is borrowed at a rate of interest 15% p.a. for 2 years. Find the simple interest on this sum and the amount to be paid at the end of 2 years.

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A sum of Rs 20,000 is borrowed by Reema for two years at an interest of 8% compounded annually. Find the compound interest (CI) and the amount she has to pay at the end of 2 years.

Find compound interest on Rs 12600 for 2 years at 10% p.a. compounded annually.

What amount is to be repaid on a loan of Rs 12000 for 1¹/₂ years, at 10% per annum compounded half yearly.

Find compound interest paid when a sum of Rs 10,000 is invested for 1 year and 3 months at 8¹/₂% per annum compounded annually.

The population of city was 20,000 in 1997. It increased at the rate of 5% per annum. Find the population at the end of the year 2000.

A TV was bought at a price of Rs 21,000. After one year the value of the TV was depreciated by 5%. Find the value of the TV after 1 year.

65% of 20 students are good in Mathematics. How many students are not good in Mathematics?

The price of an item was Rs 55,000 last year. If it has decreased by 15% this year, then what is its present price?