For   mathematics portion they manly put question from 11^th and 12^th syllabus with basic concepts just review the topics and solved some conceptual problem will help you great

  

•               Arithmetic Progression / Geometric Progression / Harmonica Progression :-

    https://www.youtube.com/watch?v=ihMp2hySaG8

•        Permutation and combination:-

    https://www.youtube.com/watch?v=aLbh7jE8xdE

•         Probability :-

     https://www.youtube.com/watch?v=O8i__zLgOWg

 

Calculus

•       Differential :-

     https://www.youtube.com/watch?v=zWA47AqArzk

•                  Integral:-

     https://www.youtube.com/watch?v=lxx_i0zCxrU    and

     https://www.youtube.com/watch?v=xT3sYgf46zE

•                 Vector:-

      https://www.youtube.com/watch?v=xqld3WYVDt0

•              Trigonometry Function:-

  https://www.youtube.com/watch?v=4gxmZH_SGd0

•        Inverse Trigonometric Function:-

       https://www.youtube.com/watch?v=jU4hWqayXvs

•                     Vector Algebra :-

       https://www.youtube.com/watch?v=Wosggu8TPhM

•                            Linear Algebra:-

       https://www.youtube.com/watch?v=ivP-6oicIWU&list=PLF895BD9018BDCDF9

It’s all friends just review all topic give you a great step ahead