Problems in which ratio of ages is given

Problems in which age of one is n xx of other

Problems in which nos are given in ratio and their sum of squares is also given

Problems in which average of consecutive nos is given

Problems in which sum of no and its reciprocal is given

Problems in which sum of two no and sum of their reciprocal is given

Problems in which product of two consecutive no is given

Problems of finding the ratio of volume/SA if ratio of radius and height of cones is given

Problems of finding the ratio of volume/SA if ratio of radius of spheres is given

Problems of finding the ratio of volume/SA if ratio of radius and height of cylinders is given

The ages of A and B are in the ratio 3:7 . Five years from now the ratio of their ages will be 1:2 . The present age of B is