The average marks of the students of a class is 68. The average marks of girls in the class is 80 and that of boys is 60. What percentage of students are boys in the class?

Find the value of

The least number, which is a perfect square and is divisible by each of the numbers 16, 20 and 24 is 

Cost of a diamond varies directly as the square of its weight. A diamond broke into four pieces with their weights in the ratio 1 : 2 : 3: 4. If the loss in the total value of the diamond was Rs.7000, the price of the original diamond was

Direction: In the following questions two equations numbered I and II are given. You have to solve both the equations and give answer.
(A) x>y
(B) x≥y
(C) x˂y
(D) x≤y
(E) x=y or the relations ship cannot be established

 I. x²-7x + 12 = 0
II. y² - 12y + 32 = 0 

A person sold a horse with a profit of 15 percent. If he had bought it for 25 percent less and sold it for less than 60 rupees, he would have gained 32 percent. The purchase price of the horse was.

The greatest fraction out of is

If θθ, the value of secθ.tanθ=?