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Which of the following equations has roots that are equal?

A. X² - 4X + 4 = 0
Posted in:  Quadratic Equations -  Algebra -  Mathematics

If the quadratic equation x² + 4x + k = 0 has roots that are real and distinct, what must be the condition on k?

B. K > 4
Posted in:  Quadratic Equations -  Algebra -  Mathematics

A can do a piece of work in 20 days, 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 A can finish a work in 24 hours and B can finish it in 36 hours, how long will they take to finish the work together?

A. 14.4 HOURS
Posted in:  Time & Work -  Aptitude -  Mathematics

If A can do a piece of work in 15 days and B can do the same work in 20 days, how much time will they take to complete the work together?

A. 12 DAYS
Posted in:  Time & Work -  Aptitude -  Mathematics