The average marks of 32 boys of section A of class X is 60 whereas the average marks of 40 boys of section B of class X is 33. The average marks for both the sections combined together is 

Which of the following quadratic equations has real roots?

Two numbers are, respectively, 10% and 25% more than the third number. The ratio of the two numbers is:

Direction: What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)

6400.002 × 49.99 %   ÷ 999.99 =?

ABC is an equilateral triangle with side 12 cm and AD is the median. Find the length of GD if G is the centroid of ΔАВС.

Successive discounts of 10% and 30% are equivalent to a single discount of : 

What is the value of a²+b²+c²-2ab-2bc+2ca?

In ΔABC, D and E are points on the sides AB and AC, respectively, such that DE || BC. If AD = 5 cm, DB = 9 cm, AE = 4 cm and BC = 15.4 cm, then the sum of the lengths of DE and EC (in cm) is: