Mathematics quiz on Ratio and Proportion

The ratio of the sum of two numbers and their difference is 7 : 3. What is the ratio of their square?

The ratio of angles of a triangles are 3: 5: 4. What is the value of largest angle?

What is the sub-triplicate ratio of 125: 64?

What is the mean proportion between 0.24 and 0.54?

The ratio between A and B is . What is the value of ?

What number should be added to each of the numbers 30, 46, 50 and 74, so that the resulting number are in continued proportion?

The ratio of present age of A and B is 4:7. After 12 years the ratio of their ages becomes 11:17. What is the present age of A?

In a mixture of 120 litres, the ratio of milk and water is 3:7. How many litres pure milk added to the mixture so that the ratio of milk and water becomes 1:2?

If 60% of a number is equal to one-fourth of another number, what is the ratio of first number to the second number?

The ratio of three numbers is 2:3:4 and the sum of their squares is 725. What is the smallest number?