Ratio between 150 gm and 2 kg

The monthly incomes of two persons are in the ratio 4:5 and their monthly expenditure are in the ratio 7:9. If each save Rs. 50 per month, find their monthly incomes.

What is the fourth proportional to the numbers 2, 5, 8?

The ratio between the speeds of two trains is 7:8. If the second train runs
400kms. In 5 hours, the speed of the first train is:

If (5x-3y)/ (5y-3x) = ¾, the value of x: yis:

A number consist of three digits of which the middle one is zero and the sum
of the other digit is 9. The number formed by interchanging the first and third
digit is more than the original number by 297. Find the number: