SSC CGL Maths Short Tricks & Fast Calculation
Short tricks are useful only after the concept is clear. Learn the shortcut, test it with simple numbers, then apply it in timed sets.
The best shortcuts reduce steps without hiding logic. Avoid tricks you cannot explain under pressure.
Percentage tricks
- Successive change: x% and y% gives net x + y + xy/100.
- x% of y equals y% of x, so 16% of 25 = 25% of 16 = 4.
- For simple-interest doubling, rate = 100/time.
Fast multiplication
| Case | Method |
|---|---|
| Number ending in 5 | 35^2 = 3 x 4 then 25 = 1225 |
| Near 100 | 98 x 97 = 9506 using deficits 2 and 3 |
| Multiply by 11 | For 43 x 11, add 4 + 3 in the middle = 473 |
| Double and halve | 25 x 48 = 50 x 24 = 100 x 12 = 1200 |
Divisibility checks
| Number | Rule |
|---|---|
| 3 | Sum of digits divisible by 3 |
| 4 | Last two digits divisible by 4 |
| 5 | Last digit 0 or 5 |
| 8 | Last three digits divisible by 8 |
| 9 | Sum of digits divisible by 9 |
| 11 | Difference of alternate digit sums divisible by 11 |
Practise safely
Use ExamRocket topic-wise practice to test shortcuts under time. Maya AI can help explain why a shortcut works, which is safer than memorising random steps.
Preparation Use
How this maths short tricks & fast calculation guide should change your SSC CGL preparation
SSC CGL Maths Short Tricks & Fast Calculation 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
- Should I learn short tricks before concepts?
- No. Learn the concept first, then use tricks to reduce calculation time.
- Which calculation trick is most useful for SSC CGL?
- Percentage conversions, squares ending in 5, divisibility rules and approximation are among the most useful.
Exam rules can change each cycle. Always confirm the latest details against the official SSC notification at ssc.gov.in.