The "Sd Yadav Maths - Ankganit (Arithmetic) - Hindi Medium" book is an offline reference guide for mathematics. It is an invaluable resource for students preparing for various competitive exams, including:

- Bank Exams: Bank PO, SBI-PO, IBPS, RBI Exams
- Entrance Exams: MBA, MAT, CMAT, GMAT, CAT, IIFT, IGNOU
- SSC Exams: SSC Combined Preliminary Exam, Hotel Management
- Defense Exams: Sub-Inspectors of Police, CBI, CPO Exams
- Officer Exams: UPSC-CSAT, SCRA, and other State Services Exams
- Railway Exams: Railway Recruitment Board Exams
- University/College Exams: Campus Recruitment Tests

Included content:

संख्या पद्धति (Number system)
वर्गमूल और घनमूल (Square root and cube root)
घातांक और करणी (Indices and surds)
भिन्न (Fraction)
सरलीकरण (Simplification)
म.स. और ल.स. (HCF and LCM)
अनुपात और समानुपात (Ratio and proportion)
आयु सम्बन्धी प्रश्न (Age-related problems)
साझा (Partnership)
मिश्रण (Alligation)
औसत (Average)
प्रतिशतता (Percentage)
लाभ और हानि (Profit and loss)
बट्टा (Discount)
साधारण ब्याज (Simple interest)
चक्रवृद्धि ब्याज (Compound interest)
कार्य और समय (Work and time)
नल और होज (Pipe and cistern)
समय और दूरी (Time and distance)
रेलगाड़ी (Train)
नाव और धारा (Boat and stream)
क्षेत्रफल (Area)
आयतन (Volume)
प्रिज्म और पिरामिड (Prism and pyramid)
त्रिकोणमिति (Trigonometry)
वृत्त, जीवा और स्पर्श रेखा (Circle, cord and tangent)
त्रिभुज (Triangle)
बीजगणितीय सूत्रों का अनुप्रयोग (Application of algebraic formulae)
निर्देशांक ज्यामिति (Coordinate geometry)
सारणीयन (Tabulation)
रेखा-चित्र (Line graph)
आयत-चित्र (Histogram)
दंड-आलेख (Bar graphs)
पाई-चार्ट (Pie chart)

This app is highly recommended for competitive exam preparation.