Merely having the PDF is not enough; using it efficiently is key to success:
Lucent’s Mathematics books (authored typically by Rishikesh Kumar or under the Lucent banner) are widely regarded as staple resources for students preparing for government job exams in India. "Part 1" generally covers the foundational arithmetic sections required for these exams.
Minimal focus on modern, complex Data Interpretation patterns seen in recent banking exams. How to Utilize this Book Effectively
Which are you currently preparing for? What mathematical topic gives you the most difficulty?