Hi Aspirant,

To solve questions on Clocks Problem, a logical as well as a formulaic approach is required.

Here i am providing you a link which provides shortcuts, formulae, tricks and some practice questions :-

https://www.google.com/amp/s/competition.careers360.com/articles/clocks-problem-in-reasoning/amp

You can do more practice questions online. They are many websites where you get lot of practice questions. Ex: indiabix, textbook.com

Hope this helps!