In every hour, a cyclist covered 1 km more distance than he was to cover with his original speed on $1×1/4$ hour.
So he covered 96 km distance early by 2 hours.
The original speed of cyclist (km/hr) is 

A. 12

If (x2 + 1/x2) = 102, then (x - 1/x) is :

B. 10

X and Y together complete a work in 8 hours. If X alone can complete it in 12 hours than Y alone can complete it in

A. 24 HOURS
Posted in:  Time & Work -  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 ?

C. 10

Value of k foe which (x - 1) is a factor of (x3 - k) is :

B. 1