Five persons, A, B, C, D, E, are sitting around a

If (2x + 3y+ 4) (2x + 3y 5) is equivalent to (ax² + by² + 2hxy + 2gx + 2fy + c), then what is the value - of ((g + f – c) / abh}?

The total number of even factors of 2⁵ × 3³ × 5² is:

If x² + y² + 2x + 1 = 0, therefore the value of x³¹ + y³⁵ is

If 3x + 5y + 7z = 49 and 9x + 8y + 21z = 126, then what is the value of y?

If a + 1/a = -2 then the value of a¹⁰⁰⁰ + a^{- 1000} is

If x1x2x3 = 4(4 + x1 + x2 + x3), then what is the value of [1/(2 + x1)] + [1/(2 + x2)] + [1/(2 + x3)]?

There are 6 blue pens, 5 black pens and 4 green pens in a bag. Three pens are chosen randomly.

If x + y + z = 19, xyz = 216 and xy + yz + 2x = 114, then the value of √ x³ + y³ + z³ + xyz  is :

10 women and 12 men complete a certain piece of work in 30 days, if each women takes thrice the time taken by a man to finish the work.