Do i need to CENGAGE book for wbjee?

Hey there hope you are doing well. Actually you don't really need Cengage book  for webjee examination as this series is particularly based on JEE advanced. You can follow some normal books like HC Verma for physics NCERT for chemistry and RD Sharma would be enough. But if you want to solve singer age you can definitely do it it is only going to improve your skills and will definitely help you in webjee. So it totally depends upon you. Hope this will help you good luck.