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A can complete a work in 10 days, and B can complete the same work in 15 days. How many days will they take to complete the work together?

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

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

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

What is the H.C.F. of the polynomials 2x^2 + 4x and 4x^2 + 8x?

A. 2X
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

If a pipe can fill a tank in 8 hours and another pipe can empty it in 12 hours, how long will it take to fill the tank if both pipes are opened together?

D. 16 HOURS
Posted in:  Time & Work -  Aptitude -  Mathematics

C can complete a work in 20 days, while D can complete 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