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Solve the following system of equations using substitution: y = 2x + 3 and 3x - y = 5. What is the value of x?

A. 1
Posted in:  Linear Equations -  Algebra -  Mathematics

If A can do a piece of work in 15 days and B can do it in 10 days, how long will it take for both A and B to complete the work together?

A. 6 DAYS
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 value of a if b = -7 and c = 12?

A. 1
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

A can do a piece of work in 12 days, while B can do it in 18 days. If they work together for 6 days, how much work is left?

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

Two workers can complete a job in 30 days. If one worker is twice as efficient as the other, how many days will it take for them to complete the job together?

C. 15 DAYS
Posted in:  Time & Work -  Aptitude -  Mathematics