SSC CGL Maths Formulas Cheat Sheet
A formula sheet is useful only when it is revised and applied. Use this page as a quick reference, then solve practice questions topic-wise.
For SSC CGL, arithmetic formulas are used most often, but advanced maths formulas can decide speed in Tier 2.
Arithmetic formulas
| Topic | Formula |
|---|---|
| Percentage | x% of y = xy/100 |
| Successive change | Net % = x + y + xy/100 |
| Profit % | Profit/CP x 100 |
| Loss % | Loss/CP x 100 |
| Discount % | Discount/Marked Price x 100 |
| Simple interest | SI = PRT/100 |
| Compound amount | A = P(1 + R/100)^T |
| Average | Sum of observations / number of observations |
| Time and work | Work = rate x time |
| Speed | Speed = distance/time |
Conversions and speed
| Conversion | Value |
|---|---|
| km/h to m/s | Multiply by 5/18 |
| m/s to km/h | Multiply by 18/5 |
| Equal-distance average speed | 2xy/(x + y) |
| Downstream speed | Boat speed + stream speed |
| Upstream speed | Boat speed - stream speed |
Mensuration formulas
| Shape | Formula |
|---|---|
| Rectangle area | l x b |
| Triangle area | 1/2 x base x height |
| Circle area | pi r^2 |
| Circle circumference | 2 pi r |
| Cube volume | a^3 |
| Cuboid volume | l x b x h |
| Cylinder volume | pi r^2 h |
| Cone volume | 1/3 pi r^2 h |
| Sphere volume | 4/3 pi r^3 |
Algebra and trigonometry
| Identity | Formula |
|---|---|
| Square of sum | (a + b)^2 = a^2 + 2ab + b^2 |
| Square of difference | (a - b)^2 = a^2 - 2ab + b^2 |
| Difference of squares | a^2 - b^2 = (a - b)(a + b) |
| Trig identity | sin^2 A + cos^2 A = 1 |
| tan A | sin A / cos A |
| Standard value | sin 30 = 1/2, cos 60 = 1/2, tan 45 = 1 |
Preparation Use
How this maths formulas cheat sheet guide should change your SSC CGL preparation
SSC CGL Maths Formulas Cheat Sheet is useful only when it changes your timetable, mock strategy, or revision order. Treat this guide as a decision page: understand the rule or strategy, convert it into a weekly target, and test it through SSC CGL mock tests and PYQ-based practice.
Before you practise
- Note the exact rule, pattern, or strategy that affects your preparation.
- Decide which subject or topic needs practice today.
- Keep official SSC instructions separate from coaching-site assumptions.
During mock analysis
- Check whether your mistakes come from speed, accuracy, or wrong topic priority.
- Compare your section-wise time with the latest exam pattern.
- Revise only the weak areas that repeatedly hurt your score.
After this guide
- Take one free topic test to confirm understanding.
- Add difficult mistakes to revision.
- Attempt a mixed mock so the rule is tested under exam pressure.
Join and turn this guide into practice
ExamRocket connects guides, free mock tests, PYQ-based practice, daily missions, and mistake review. That matters because reading a guide does not improve rank unless it changes what you practise next.
Join free and start practiceFrequently asked questions
- Are formulas enough for SSC CGL Maths?
- No. Formulas help speed, but you must practise question types and learn when to apply each formula.
- Which formulas should I revise daily?
- Revise percentage-fraction conversions, SI-CI, time-work, speed, mensuration, algebra identities and standard trigonometry values.
Exam rules can change each cycle. Always confirm the latest details against the official SSC notification at ssc.gov.in.