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Find the values of k ε R subject to the following condition :
Two roots of $x^2 +(k - 2)x + (2k + 1) = 0$ are equal.

D. 0, 12
Posted in:  Quadratic Equations -  Algebra -  Mathematics

If x3 + 6x2 + 4x + k is exactly divisible by (x + 2), then the value of k is :

C. - 8
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

If (x + 1/x) = 4, then (x4 + 1/x4) is equal to :

B. 194
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

If a + b + c = 0, then (a3 + b3 + c3) is equal to :

C. 3 ABC
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

A and B can do a piece of work in 10 days and 15 days respectively. A alone starts the work. Then, 5 days after he is joined by B. In how many days, work will be completed ?

B. 8
Posted in:  Time & Work -  Aptitude -  Mathematics