17, 52, 158, 477, ? , 4310
What will be come in place of question mark(?) in the following number series?17, 52, 158, 477, ? , 4310
A clock only with only dots marking 3, 6, 9 and 12 positions has been kept upside down in front of mirror. A person reads the time in the reflection of the clock as 4.50. What is the actual time?
A train moving at speed of 90 km/hr crosses a pole in 7 seconds. Find the length of the train.