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If 3x - 3x-1 = 18, then the value of xx is :

C. 27
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics

A man takes 5 hours 45 min. in walking to a certain place and riding back. He would have gained 2 hours by riding both ways. The time he would take to walk both ways, is:

A. 7 HOURS 45 MINUTES
Posted in:  Time, Distance and Speed -  Aptitude -  Mathematics

A and B start at the same time with speeds of 40 km/hour and 50 km/hour respectively.
If in covering the journey, A taken 15 minutes longer than B, the distance of the journey is :

C. 50 KM
Posted in:  Time, Distance and Speed -  Aptitude -  Mathematics

Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?

A. A
Posted in:  Time, Distance and Speed -  Aptitude -  Mathematics

If (x - 1/x) = 1/2 , then (4x2 + 4/x2) is equal to :

C. 9
Posted in:  Basic Operations & Factorization -  Algebra -  Mathematics