Which of the two numbers should be reduced in the ratio of 15:19 so that the ratio becomes 3: 4?

If $$ {a\over x}+{b\over y}=m$$ and $$ {b\over x}+{a\over y}=n$$ then x:y will be__

The income of A and B are in the ratio of 4:7. A and B saves Rs. 4000 and 5000 respectively. If the expenditure of A is equal to 60% of the expenditure of B. Then, find the difference between their incomes.

What number must be subtracted from each of the numbers 55, 23, 43 and 19, so that the new values are in proportion? 

The distance traveled by three cars in the ratio of 1: 2: 3. If the travel time ratio is 3: 2: 1, what is the ratio of their speed?

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)?

Six years ago, the ratio of the ages of the two persons P and Q was 3:2. Four years hence the ratio of their ages will be 8:7. What is P’s age?

A sum of Rs 125 is divided among u, v and w in such a way that u gets Rs 10 more than v and v gets Rs 5 more than w. What is the ratio of their shares?