Hi All,

Can you please provide me the solutions to the below problems with steps on how to get the answer for the question below.

I know the below problem is related to HCF or LCM but i am finding it difficult to implement the concept to get to the solution.

At a book store ,MODERN BOOK STORE,is flashed using neon light.The word is individually flashed at interval 5/2,17/4,41/8 seconds respectively ,and each word is put off after a second.The least time after which the full name of the book store can be read again is?

A red light flashes 3times per min and green light 5times in 2mins at regular interval.If both light flashing at the same time,how many time do they flash together in each hour.

This is a different problem.

A train approaches tunnel AB.Inside the tunnel is a cat located at point 3/8th of the distance AB measured from the entrance A.When the train whistles the cat runs.If the cat moves to the entrance of the tunnel A the train catches the cat exactly at the entrance.If the cat moves to the exit ,the train catches the cat at exactly the exit,B,the speed of the train is greater than the speed of the cat by what order?

I want the steps and explanation on how you arrived at solution please.

Thanks.