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

A car travels 150 kilometers in 2 hours. What is its average speed?

B. 75 KM/H

Which of the following is a factor of the polynomial x^2 - 5x + 6?

A. X - 2

If a person walks at a speed of 4 km/h, how long will it take to walk 10 km?

A. 2.5 HOURS

If the roots of the quadratic equation x² - 5x + k = 0 are real and equal, what is the value of k?

A. 6.25
Posted in:  Quadratic Equations -  Algebra -  Mathematics