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Maths

Premium access Mathematics course

Calculate Faster. Think Smarter.

Explore practical calculators and learning tools for mathematics, competitive exams, finance, business, and everyday life. Start free and upgrade when you’re ready.

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The calculators are free, with no account. 6 lessons are free with a free account — no card needed.

A study desk with an open notebook, a calculator, a stopwatch, a pencil and a toy car on a road map.

Speed, distance & time

Speed = Distance ÷ Time

80 km in 2 hours → 40 km/h

88 lessons · 13 parts

What you’ll find here

  • All Calculators

    Explore mathematics, finance, business, and everyday calculation tools.

  • Government Exam Practice

    Practise quantitative aptitude and calculation skills for competitive examinations.

  • Step-by-Step Solutions

    Understand calculation methods through clear explanations where available.

  • Learning Tools

    Explore formulas, worked examples, and practice activities.

  • Accessible Learning

    Enjoy a clear, comfortable interface designed for learners with different needs and abilities.

Free

Start Learning for Free

₹0free, with no time limit

Explore before you decide whether Premium is right for you. No purchase needed.

  • 7 free calculators — No account needed.
  • 6 free lessons — With a free account — it takes a minute, and no card.
  • Nothing turns into a payment by itself — Premium is only ever something you ask for.
Start Learning Free Explore Premium

Free calculators No account needed

Free Starter · 6 free lessons

Your First Lesson Is Free in Parts One to Six

Try one free lesson from each of the first six parts and explore the course.

No payment. No card. Just start learning.

The free lessons open with a free account. It takes a minute and needs no card. Create a free account or log in.

Three steps

How It Works

Get started in just a few simple steps.

  1. Step 1 Choose a Free Lesson Explore one free lesson from each of Parts One to Six.
  2. Step 2 Create Your Free Account Create an account to open your lessons and keep your progress. No card needed.
  3. Step 3 Start Learning Follow short visual lessons, practise the questions, and learn at your own pace.

Two ways to learn

Choose Your Learning Style

Whether you prefer learning independently or learning with a teacher, choose the option that works best for you.

  • On your own

    Calculate Smarter Premium App

    For learners who want to study independently.

    From ₹119paid once

    Access: 1 month to 4 years — you choose

    • Learn at your own pace
    • Access premium lessons — all 88
    • Practice questions
    • Speed tests
    • Learning progress tracking
    • Choose from five access durations
    Explore Premium Plans

  • With a teacher

    Calculate Smarter Live Classes + Premium

    For learners who want structured teaching and app access.

    From ₹2,499total, paid once

    Access: Quick Learning ₹2,499, 3 Months + 15 Bonus Days · Flexible Learning ₹3,499, 6 Months + 15 Bonus Days

    • Live group classes on Zoom
    • Four classes a week
    • Two paces: Quick or Flexible Learning
    • The same 88 tricks and 13 parts in both
    • Premium App access (+ 3 months free)
    • Guided practice and revision
    Explore Live Classes

The two, side by side

  • Independent learning

    Premium App
    Yes: At your own pace
    Live Classes
    Yes: Between classes, in the Premium App

  • Premium lessons

    Premium App
    Yes: All 88 lessons, 13 parts
    Live Classes
    Yes: All 88 lessons, 13 parts

  • Practice questions

    Premium App
    Yes: On every lesson
    Live Classes
    Yes: On every lesson

  • Speed tests

    Premium App
    Yes: 4 speed tests
    Live Classes
    Yes: 4 speed tests

  • Learning progress tracking

    Premium App
    Yes: Across all 88 lessons
    Live Classes
    Yes: Across all 88 lessons

  • Live teaching

    Premium App
    No: Not included
    Live Classes
    Yes: Live group classes on Zoom

  • Live sessions

    Premium App
    No: Not included
    Live Classes
    Yes: Four a week. Quick Learning: about 60 minutes, 2–3 tricks each · Flexible Learning: about 45 minutes, one trick each

  • Instructor-guided practice

    Premium App
    No: Not included
    Live Classes
    Yes: Guided practice and revision in class

  • Course access duration

    Premium App
    The plan you choose: 1 month to 4 years
    Live Classes
    Quick Learning: 3 Months + 15 Bonus Days · Flexible Learning: 6 Months + 15 Bonus Days — then the Premium App, free, for 3 more months

  • Price

    Premium App
    From ₹119 — paid once
    Live Classes
    Quick Learning ₹2,499 · Flexible Learning ₹3,499 — paid once

The Four Years plan (₹2,499) is four years of the Premium App on your own. The Live Classes are live teaching with the Premium App for the same dates, and the app for 3 more months, free: Quick Learning + Premium (₹2,499, 3 Months + 15 Bonus Days) or Flexible Learning + Premium (₹3,499, 6 Months + 15 Bonus Days) — the same 88 tricks in both, at a different pace. They don’t include a separate Premium plan.

Competitive exams

Preparing for Government Exams?

Practise calculation skills for competitive exams with tools designed to help you understand numerical concepts and work through problems.

The course starts from school basics and builds up to exam-style word problems, so it works for beginners as well as anyone preparing for SSC, banking, railway or Rajasthan recruitment exams.

Explore Exam Practice

SilentWorks isn’t connected with any government body or exam board, and no course can promise exam results or selection.

Course overview

Five levels. 88 lessons.

From the first multiplication shortcuts to the hardest word problems — one short lesson at a time, each with its own practice.

Total · 88 lessons

  1. Level 1 2 free

    Multiplication & Squaring

    Shortcuts for ×11, ×5, ×25 and ×9, two-digit products, and squaring in your head.

    18 lessons · Lessons 1–18

  2. Level 2 2 free

    Division, Addition & Subtraction

    Fast division, divisibility tests and remainders, and adding and subtracting from the left.

    18 lessons · Lessons 19–36

  3. Level 3 2 free

    Percentages & Everyday Maths

    Percentages, discounts, fractions and ratios, money, units, time and speed.

    18 lessons · Lessons 37–54

  4. Level 4 Full course

    Exam Skills, Fractions & Algebra

    Estimating and patterns, fraction and decimal operations, algebra identities, roots and cubes.

    20 lessons · Lessons 55–74

  5. Level 5 Full course

    Advanced Mental Maths

    More multiplication methods, HCF and LCM, compound change, interest and word problems.

    14 lessons · Lessons 75–88

Contents

All thirteen parts

Every part, and which of its lessons is free.

  1. Part 0 · Read first Guide · read first

    How to teach this book

    Fifteen minutes a day, one trick at a time. What to do when they get it wrong, six things not to say, and where to start depending on the class.

  2. Part 1 · Lessons 01–08 Lesson 01 free

    Multiplication Shortcuts

    The numbers that come up most often — 5, 9, 11, 15, 25 and 99 — plus the criss-cross, which works on any two-digit sum. Do them in order; each one uses the one before it.

  3. Part 2 · Lessons 09–18 Lesson 09 free

    Squaring & Number Patterns

    Squaring saves more exam time than anything else in the book. Square any two-digit number, and several three-digit ones, without a single row of working.

  4. Part 3 · Lessons 19–27 Lesson 19 free

    Division Made Fast

    Dividing by 5, 25, 4, 8 or 50 is really multiplying by something easy and moving a decimal point. Plus the divisibility tests that tell you in advance whether it comes out clean.

  5. Part 4 · Lessons 28–36 Lesson 28 free

    Addition & Subtraction Speed

    Reverse the direction, replace carrying with rounding, and turn subtraction into counting on. Every one can be done without writing anything down.

  6. Part 5 · Lessons 37–48 Lesson 37 free

    Fractions & Percentages

    Discounts, GST, profit and loss, ratios and reverse percentages — the whole of Class 6 to 10 commercial arithmetic, done mentally.

  7. Part 6 · Lessons 49–54 Lesson 49 free

    Money, Time & Measurement

    Where the arithmetic leaves the exam paper and enters ordinary life. Money, clocks, kilometres and averages, and the small trap inside each one.

  8. Part 7 · Lessons 55–60 Full course

    The Exam & Olympiad Edge

    How to attack a paper rather than how to calculate. Worth more marks than anything else in the book.

  9. Part 8 · Lessons 61–65 Full course

    Fractions & Decimals: The Operations

    The four operations look similar on the page and behave completely differently. This fixes the speed and the confusion at the same time.

  10. Part 9 · Lessons 66–70 Full course

    Algebra & Identities

    The Class 8 to 10 identities are not formulas to memorise — they are calculation tools. (a + b)² squares any number in your head.

  11. Part 10 · Lessons 71–74 Full course

    Roots & Cubes

    Roots of exact numbers read straight off the page. The last digit gives you one half of the answer, the size gives you the other.

  12. Part 11 · Lessons 75–81 Full course

    More Multiplication Methods

    Doubling and halving, numbers just below a hundred, twelves, fours and eights, 125, a long number by a single digit, and the full crosswise method for three-digit numbers.

  13. Part 12 · Lessons 82–84 Full course

    HCF, LCM & Compound Change

    The highest common factor by subtraction, the lowest common multiple straight from it, and two percentage changes folded into one multiplier.

  14. Part 13 · Lessons 85–88 Full course

    Word-Problem Shortcuts

    Simple interest without the formula, compound interest for two years, time and work by the LCM method, and mixtures by the alligation rule.

Transparent pricing

Clear prices. No surprises.

  • Clear Pricing

    Every price is the full amount, paid once, upfront: the Premium App from ₹119, Quick Learning + Premium ₹2,499 or Flexible Learning + Premium ₹3,499. Nothing is charged monthly.

  • Defined Access Period

    Premium App and Flexible Learning + Premium: from the day we approve your request (payment confirmed), for the plan’s length. Quick Learning + Premium: from the batch’s first class. Each live plan adds 15 days, then 3 months of the Premium App, free. Your dates are shown in your account.

  • Renewal

    Nothing renews automatically. When access ends, the free lessons stay open and your progress is kept.

  • Refund Policy

    Our refund policy is being written. Requests open once it’s published, so you can read it first.

  • Support

    Questions about plans, classes or payment? Email hello@silentworks.net or use the contact form.