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Quantitative Aptitude for SSC CHSL

Arithmetic from the number system and percentages to interest, time and work and speed, plus algebra, geometry, mensuration, trigonometry and data interpretation, mostly at Class 10 level. Tier 1 has 25 questions; Tier 2 has a 90-mark maths module.

8 guides·Conducted by Staff Selection CommissionOfficial website

Study in this order

  1. 1A maths plan for SSC CHSLSSC CHSL maths is mostly Class 10 level (percentages, ratios, averages, interest, time and work, basic algebra, geometry and mensuration) tested against the clock. With a clear topic order, a few shortcuts you understand rather than memorise, and a daily practice habit, even students who dread maths can score well. A 12-week order, the core shortcuts with why they work, six worked questions and a practice set. 7 min read
  2. 2Number system for SSC CHSLHow many numbers from 1 to 100 are divisible by 7? What is the remainder when 2²⁰ is divided by 5? What must x be for 73x45 to be divisible by 11? Number system questions in SSC CHSL are short and rule-based. Types of numbers, divisibility tests and why they work, counting multiples, factors, remainders, unit digits and recurring decimals, with worked examples and a practice set. 7 min read
  3. 3HCF and LCM for SSC CHSLBells that ring together, the largest tile that fits a floor exactly, the smallest number that leaves the same remainder: HCF and LCM questions in SSC CHSL come in a handful of familiar shapes. How to find HCF and LCM quickly and why the methods work, the product rule, fractions and decimals, how to tell which one a word problem wants, six worked questions and a practice set. 7 min read
  4. 4Simplification and approximation for SSC CHSLSimplification questions in SSC CHSL look like school arithmetic (brackets, fractions, decimals, square roots) and are lost mostly through haste. BODMAS in the right order and why, fraction and decimal shortcuts, algebraic identities that collapse long expressions, approximation that matches the options, and checks that catch errors. Six worked questions and a practice set. 6 min read
  5. 5Percentages for SSC CHSLPercentages sit underneath half of SSC CHSL arithmetic: profit and loss, discounts, interest, population, marks, elections and data interpretation. Fraction equivalents, the multiplier method, successive changes and the "more than, less than" reversal, each with the reason it works, plus six worked questions and a practice set with solutions. 7 min read
  6. 6Profit and loss for SSC CHSLA fruit seller buys at one rate and sells at another, a trader sells to a trader, a dealer uses a false weight. Profit and loss questions in SSC CHSL follow a handful of patterns, and all of them are percentage questions on the cost price. The methods and why they work, seven worked questions and a practice set with solutions. 6 min read
  7. 7Discounts and marked price for SSC CHSL"Flat 30% off", "20% + 10% off", "buy 2 get 1 free". Discount questions in SSC CHSL mirror the offers on every shop window. Discount is taken on the marked price, successive discounts don't add up, and a shopkeeper can discount and still profit. The methods with reasons, six worked questions and a practice set with solutions. 5 min read
  8. 8Ratio and problems on ages for SSC CHSL"The ratio of a mother's age to her daughter's is 7 : 2; after 5 years it will be 8 : 3." Age problems and ratio questions are close cousins — both are solved by letting one "part" be x and writing a simple equation. How to handle ratios, combine them, divide amounts, and solve the standard age problems quickly, with worked examples and answers. 3 min read

New Quantitative Aptitude guides are added regularly. Back to all SSC CHSL guides