The ratio of coins of 50 paisa, 25 paisa, and 10 paisa is 4:3:2. Find the total amount if the number of coins is 90.

Difference of two numbers is 1890. If 12.5% of one number is 17.5% of the other number, Find the two numbers.

If 50% of (x −y) = 30% of (x + y), then what percent of x is y? 

72 grams is what percent of 3.6 kilograms?

Two students appeared for an examination. One student who scored 20 marks more than the other, his score was 60 % of the sum of their marks. What was his score?

The population of a city in the year 2020 was 2,00,000. The rate of growth of population is 8% per annum. Find the population of that city in the year 2022.

After an increase in tea price by 40% a family reduce its consumption of tea to the extent that there should be an increase on tea expense only by 10%. If the earlier consumption of tea was 28 kg, then what will be their new consumption?

The number of students in a school increases and decreases by 10% respectively in every alternate year. If there was increase in the year 2000 then in how much percentage what happened in the number of students in the vear 2003 in comparison to year 2000.