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A can do a piece of work in 20 days, while B can do it in 30 days. If they work together for 10 days, how much of the work is left?

A. 1/3
Posted in:  Time & Work -  Aptitude -  Mathematics

If the roots of the quadratic equation ax^2 + bx + c = 0 are 3 and 4, what is the relationship between the coefficients and the roots?

C. A = 1, B = -7, C = 12
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

Which of the following pairs of equations represents parallel lines?

A. 2X + Y = 4 AND 4X + 2Y = 8
Posted in:  Linear Equations -  Algebra -  Mathematics

A practical problem states that a car travels 60 km/h and a truck travels 40 km/h. If they start at the same point and travel in the same direction, how far apart will they be after 2 hours?

A. 20 KM
Posted in:  Linear Equations -  Algebra -  Mathematics

What is the L.C.M. of the polynomials x^2 - 1 and x^2 - 4?

A. (X - 1)(X + 1)(X - 2)(X + 2)
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics