Quantitative Aptitude - Arithmetic Ability Questions

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

If cosA/(1 - sinA) = x, then the value of x is

Coefficient of x2 in (x + 7)(5 - 3x)(3x - 6) is

Find the value of 491321973

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

Find the fraction which bears the same ratio to 1/27 that 3/7 does to 5/9 .

Working together P, Q and R reap a field in 6 days. If P can do it alone in 10 days and Q in 24 days, in how many days will R alone be able to reap the field?

ABCD is a quadrilateral in which BD and AC are diagonals then