Question
Find the wrong number in the given number series.
7, 16, 34, 70, 144, 290Solution
ATQ,
7 × 2 + 2 = 16
16 × 2 + 2 = 34
34 × 2 + 2 = 70
70 × 2 + 2 = 142
142 × 2 + 2 = 286
So, 142 should come in place of 144
Train P takes 27 seconds to cross a tree, and Train Q overtakes Train P, both traveling in the same direction, in 3 minutes. The ...
Train A leaves a station at a certain time and at a fixed speed. After 4 hours, Train B leaves the same station and moves in the same direction at a uni...
A train 200 metre long takes 30 sec to cross a man running at a speed of 4 km/hr in the direction opposite to that of train. What is the speed of the tr...
Two trains of same length are running in parallel tracks in the same direction with speed 61 km/hr and 115 km/hr respectively. The latter completely cro...
A train with 8 compartments of equal length takes 18 seconds to cross a pole and 24 seconds to cross a 150-metre-long platform. If 4 compartments of the...
Train 'A' is 200 meters long and takes 15 seconds to cross a pole. The same train crosses train 'B' (which is 240 meters long) coming from the opposite ...
A train has to cover a distance of 210 km in 14 hours. If it covers half journey in 4/7th time, then the speed of covering the remaining dist...
350 metre long train ‘A’ is running with a speed of 43.2 km/hr. Train ‘B’ which is 387 metre long is running with a speed of 90 km/h in opposite...
The ratio between the speeds of train J and K is 7:5 respectively. Train J which is (a+140) metre long can cross a pole in 24 seconds. If train K can cr...
A train 460 metres long is running at a speed of 54 km/hr. If it crosses a tunnel in 1 minute, then the length of the tunnel (in meters) is:
Relevant for Exams:
