The population of Jaipur is 20,00,000. If it is increased by 5 %, 10%, 20% respectively in the next three years, then find the population of Jaipur after 3 years.

If x is the mean proportional between 20 and 5 and y is the third proportional to 16 and 64, then find the value of x/y. 

According to the will the wealth of Rs. 21,25,000 was to be divided between the son and the daughter in the ratio $$ {7\over6}:{5\over3}$$. How much did the son get (in Rs.)?

If Rs. 25,000 is to be divided between A, B and C in the ration 1/10 : 1/6: 1/15, then how much will C get (in Rs)?

Rizwan has a box in which he kept red and blue marbles. The red marbles and blue marbles were in the ratio 5:4. After he Lost 5 red marbles the ratio become 10:9. How many marbles does he have now?

If A : B= 3:4, B: C = 2:3 then A+B : B+C: C+A =?

If 4A=6B =5C; then A:B:C is

The students in three classes are in the ratio 2 : 3 : 5. If 20 students are increased in each class, the ratio changes to 4 : 5 : 7 . originally the total number of students was: