Mathematics
Chapters
1. Number System (RRB)
Naturals, integers, rationals, divisibility rules, LCM/HCF, factorials, unit digits.
2. Simplification & Approximation
BODMAS, fractions, decimals, Vedic tricks for fast calculation.
3. Percentage (RRB)
Percentage-fraction conversions, successive %, application problems.
4. Ratio and Proportion (RRB)
Direct, inverse, compound; partnerships; mean proportional.
5. Average (RRB)
Simple, weighted, problems on age/height/weight, replacement.
6. Profit, Loss, Discount (RRB)
CP/SP/MP, profit/loss %, successive discounts, dishonest dealer.
7. Simple & Compound Interest (RRB)
SI/CI formulas, difference for 2/3 years, installments, growth.
8. Time, Speed, Distance (RRB)
TSD, average speed, relative speed, trains, boats, races.
9. Time and Work (RRB)
Joint work, pipes & cisterns, efficiency, men-days, wages.
10. Mixture and Alligation (RRB)
Alligation rule, replacement, weighted average problems.
11. Mensuration (RRB)
2D: triangle, rectangle, circle. 3D: cube, cuboid, cylinder, cone, sphere.
12. Geometry (RRB)
Lines & angles, triangles, similar/congruent, circles, polygons.
13. Trigonometry (RRB)
Trig ratios, identities, heights & distances.
14. Algebra (RRB)
Linear/quadratic equations, identities, sequences.
15. Data Interpretation (RRB)
Tables, bar/pie/line charts, caselet — DI for RRB.