Best math&physics book for railway technical job after 12 th
For maths you can have these books :
Quantitative Aptitude for Competitive Examinations (Fully Solved)
R.S Aggarwal
Practice Book on Quicker Maths
M.Tyra, K.Kundan
Fast Track Objective Arithmetic
Rajesh Varma
Fir physics there is no specific book so you can refer to ncert books and other reference books.Apart frpm that you need to prepare for reasoning and ge eral knowledge too.
I hope this helps