Numerical: The ratio between the present ages of A and B is 5:3.
The ratio between A’s age 4 years ago and B’s age 4 years hence is 1:1.
These three types may cover cases of various types with different combination of ratios, fractions etc.
Before moving forth with the above given types of problems keep in mind these quick tips:- Case 1: Whole number form Numerical: The age of mother is thrice that of her daughter.
In this case both equations have "y" so let's try subtracting the whole second equation from the first: So now we know the lines cross at x=1.