Quantitative Aptitude - Arithmetic Ability Questions

In an examination, 35% of total students failed in Hindi, 45% failed in English and 20% failed in both. Find the percentage of those studnets who passed in both the subjects ?

Rs. 782 is divided into 3 parts in the ratio 12:23:34, the first part is 

What will come in the place of question mark (?) in the following question (You do not have to calculate the exact value)?

√(3099.985 ÷ 62.001 + 14.001) = ?

If ab = 21 and a+b2a-b2 = 254,then the value of a2+b2+3ab

If cot A = n/(n + 1) and cot B = 1/(2n + 1), then what is the value of cot (A + B)?

In which of the following quadrilaterals both pairs of opposite sides are parallel?

ΔABC a right angled triangle has ∠B = 90° and AC is hypotenuse. D is its circumcentre and AB = 3 cms, BC = 4 cms. The value of BD is

The amount of simple interest accrued on an amount of Rs 28,500 in seven years is Rs 23,940 What is the rate of interest p.c.p.a ?