Boys

Two boys are playing on a ground. Both the boys are less than 10 years old. Age of the younger boy is equal to the cube root of the product of the age of the two boys. If we place the digit representing the age of the younger boy to the left of the digit representing the age of the elder boy, we get the age of father of the younger boy. Similarly, if we place the digit representing the age of the elder boy to the left of the digit representing the age of the younger boy and divided the figure by 2, we get the age of mother of the younger boy. The mother of the younger boy is younger to his father, by 3 years. Then, what is the age of the younger boy

There are 350 boys in the first three standards. The ratio of the number of boys in first and second standards is 2:3, while that of boys in second and third standards is 4 : 5. What is the total number of boys in first and third standards ?

In a school there are 180 students, out of which 1/3 rd are boys and rest are girls 1/3 rd of the boys are players and rest of the boys are not players, then the number of boys which are not players are

There are 50 boys in a class,one boy weighting 40 kg goes away and at the same time another boy joins the class. If the average weight of the class is thus decreased by 100 g, find the weight of the new boy?

The ratio of the number of boys to the number of girls in a school activity is 3:4. There are 18 more girls than boys. If 6 boys quit, what will be the new ratio of the number of boys to the number of girls?