Quantitative Aptitude - Arithmetic Ability Questions

If 3:27 :: 5:?

If [√(a2 + b2 + ab)] + [√(a2 + b2 – ab)] = 1, then what is the value of (1 – a2 )(1 – b2 )?

What is the simplest form of (1 + cosA)(cosecA ­ cotA)?

Select the odd word/letters/number/number pair from the given alternatives.

In the following question, select the odd letter/letters from the given alternatives.

If O is the centre of a circle of radius 5 cm. At a distance of 13 cm from O, a point P is taken. From this point, two tangents PQ and PR are drawn to the circle. Then , the area of quadrilateral PQOR is

In a circle, a chord, 5√2 cm long, makes a right angle at the centre. Then the length of the radius of the circle will be

Of the 3 numbers whose average is 72, the first is 2/7 times the sum of other 2. The first number is