Quantitative Aptitude - Arithmetic Ability Questions

The mean of marks secured by 55 students in division A of class X is 58, 45 students of division B is 54 and that of 75 students of division C is 52. Find the mean of marks of the students of three divisions of Class X.

A person lent certain sum of money at 10% per annum simple interest. In 20 years the interest amounted to Rs 500 more than the sum lent. What was the sum lent (in Rs)?

The two roots of a quadratic equation are given as x = 1/7 and x = -1/8 . The equation can be written as:

What is the measure of central angle of the arc whose length is 11 cm and radius of the circle is 14 cm?

If 3A = 2B = C, then A : B : C = ?

A trader marks his goods in such a way that after allowing a discount of 10% he gains 15%. If an article costs him Rs. 720, his marked price is

A shopkeeper by selling 21 items earns a profit equal to the selling price of 1 item. What is his profit percentage?

In the given figure, ABCDEF is a regular hexagon whose side is 6 cm. APF, QAB, DCR and DES are equilateral triangles. What is the area (in sq.cm) of the shaded region?