The population of a small city decreased every year due to water contamination. The present population of the town is 1,39,650. Last year, the migration was 2%, and the year before last, it was 5%. What was the population of the city two years ago?

The population increases by 13% annually. If the current population is 43,000, what will it be after 3 years? (in approx.)

$$\frac59$$​th part of the population in a village are males. If 30% of the males are married, then what percentage of the total population consists of unmarried females ?

The population of a town increases by 10% in the first year and 20% in the second year. If the present population is 66,000 , what was the population two years ago?

In a school, 180 students are studying in the 9^th class. Among them, 35% are rich and others are poor. There are 80 girls in the class, of whom 65% are poor. How many rich boys are there in the class?

The count of a certain breed of bacteria was found to increase at the rate of 4% per hour and then decrease by 2% per hour. Find the bacteria at the end of 2 hours if the count was 2,00,000 initially.

In an examination 95% of the candidates passed and 150 failed. The number of candidates who appeared in the examination is.

The population of a district is 327000, out of which 224000 are males. 65% of the population is literate. If 65% males are literate, then what percentage of females are literate?

The population of a district is 383000, out of which 221000 are males. 58% of the population is literate. If 58% males are literate, then what percentage of females are literate?

The population of a district is 357000, out of which 194000 are males. 47% of the population is literate. If 47% males are literate, then what percentage of females are literate?