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If $x^2 - 6x + α = 0 has two roots α, β and 3α + 2β = 20, then find a.

A. - 16
Posted in:  Quadratic Equations -  Algebra -  Mathematics

If 2x - 2x-1 = 16, then the value of x2 is :

D. 25
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

If 40 men can build a wall 300 m long in 12 days working 6 hours a day, how long will it take 30 men to build a similar wall 200 m long working 8 hours a day ?

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

If the roots of the equation $x^2 - 10x + k - 1 = 0$ are α and β and $α^3 + β^3 = 70$,
then find the value of k.

A. 32
Posted in:  Quadratic Equations -  Algebra -  Mathematics

X and Y together complete a work in 8 hours. If X alone can complete it in 12 hours than Y alone can complete it in

A. 24 HOURS
Posted in:  Time & Work -  Aptitude -  Mathematics