The graph of the equation 4x - 5y = 20 intersects the X-axis at the point.

Seema’s present age is four times her son’s present age and four seventh of her father’s present age. The average of the present age of all three of them is 32 years. What is the difference between the Seema’s son’s present age and Seem’s father’s present age?

If the amount is $$ 3{3\over8}\%  $$ times the sum after 3 years at compound interest compounded annually, then the rate of interest per annum is 

A boat running downstream covers 28 km in 7 hours, while for covering the same distance upstream it takes 14 hours. What is the speed of the boat in still water?

Subjects, there were 9 boys and some girls. In a test, the mean score obtained by the boys was 13 while that obtained by the girls was 15. If the overall average was 14.28, what was the total number of students in the class? 

If four coins are tossed together, what is the probability of at least getting 2 heads?

A work is done in 16 days by 8 labours. They worked together for 2 days and after that 8 additional labours joined them. The rest work will be finished by them in ______

A square has a perimeter equal to 24 units. If the length of each side of the square is reduced by 2 units, then find the area( in sq units) of the square.