Seven poles P, Q, R, S, T, U and V are put in such a way that the distance between the next two decreases by 1 metre. The distance between the first two poles P and Q is 10 metres. What is the distance between first pole P and the last pole V?

Two trains A and B started from stations P and Q respectively towards each other. Train A started at 7 p.m. at a speed of 60 km/hr and train B started at 4 a.m. (next day) at a speed of 90 km/hr. The…

Two trains A and B started from stations P and Q respectively towards each other. Train A started at 7 p.m. at a speed of 60 km/hr and train B started at 4 a.m. (next day) at a speed of 90 km/hr. The…

A monkey climbs a 12 metre high pole. In the first minute he climbs 2 metres and slips down in the next minute by 1 metre. If this process continues, then in how many minutes will the monkey reach th…

Street-light pillars are installed in a straight line at 50 m intervals. Distance between first and ninth pillar?

Two trains A and B started from stations P and Q respectively towards each other. Train A started at 7 p.m. at a speed of 60 km/hr and train B started at 4 a.m. (next day) at a speed of 90 km/hr. The…