How much percent above the cost price should a shopkeeper mark his goods so as to earn a profit of 10% after allowing a discount of 12% on the marked price? 

Direction: In the given question, two equations numbered l and II are given. Solve both the equations and mark the appropriate answer.

I. x² + 13x + 42 = 0
II. y² – 2y - 63 = 0

In a circle with centre O, a diameter AB is produced to a point P lying outside the circle and PT is a tangent to the circle at the point C on it. If ∠BPT = 36°, then what is the measure of ∠BCP?

Annual salary of Varun is 7.68 lac. In a month if he spends 12000 on his children, 1/13th of rest on food and 8000 in  mutual funds from his monthly salary, then find the monthly saving he is left with.

What approximate value should come in the place of question mark (?) in the following question?

{44.95 - (16.97 × 2.93 - 2.99 × 1.92)} = ?

The diagonal of a square A is (a+b). The diagonal of a square whose area is twice the area of square A, is

The adjoining diagram is frequency polygon for the scores of students in a test.
What is the total number of students appeared in the test?

Find the exact value of cos 120⁰.