List of top General Aptitude Questions on Ratio and Proportion

If 36: 84 :: 42: X, then the value of X, is:

The ratio of the ages of A and B is 4:5. After 6 years, the ratio becomes 5:6. What is the present age of A?

If the ratio between the first number and the second number is 2:3 and that between the second and third number is 5:3, then the first number is:

In a class of 40 students, the ratio of boys and girls is 3 : 2 and the average marks scored by boys is 42 and that by girls is 46. What is the average marks scored by the whole class?

The number of students in three classes is in the ratio \(3:13:6\). If 18 students are added to each class, the ratio changes to \(15:35:21\).
The total number of students in all the three classes in the beginning was:

The ratio of boys to girls in a class is 7 to 3. Among the options below, an acceptable value for the total number of students in the class is: