Skip to main content

10 Cool Mathematics Tricks to Amaze Your Mind!

Mathematics is often considered challenging, but it’s also filled with fun tricks and shortcuts that can make solving problems quicker and more engaging. Here are ten fascinating math tricks that you can easily share or use to sharpen your math skills.


1. The Rule of 11 for Quick Multiplication

Want to multiply any two-digit number by 11? Here's a quick trick:

  • Separate the digits of the number. For example, for 54, write it as 5 and 4.
  • Add the two digits: 5+4=95 + 4 = 9.
  • Place this sum between the original digits: 594594.
    So, 54×11=59454 \times 11 = 594. If the sum of the digits exceeds 9, carry the extra digit over to the first number.

2. The Magic of 9 in Multiplication

The number 9 is magical in multiplication:

  • Multiply any number by 9, and the sum of the digits in the result will always equal 9.
    Example: 9×7=639 \times 7 = 63, and 6+3=96 + 3 = 9.

3. Squaring Numbers Ending in 5

For any two-digit number ending in 5, you can find its square instantly:

  • Multiply the first digit by one more than itself.
  • Append 2525 to the result.
    Example: 35235^2: 3×4=123 \times 4 = 12, and appending 2525, we get 12251225.

4. Divisibility Rules

  • By 3: A number is divisible by 3 if the sum of its digits is divisible by 3.
  • By 9: The same rule applies as for 3 but with 9.
  • By 11: Alternate the sum of digits and subtract. If the result is 0 or divisible by 11, so is the number.

5. The Finger Multiplication Trick for 9

Want to multiply by 9 without a calculator? Use your fingers:

  • Hold out 10 fingers.
  • For 9×49 \times 4, fold down your 4th finger.
  • Count fingers to the left of the folded one (3) and fingers to the right (6). The answer is 36!

6. Adding Fractions Made Easy

Instead of finding the least common denominator, use the butterfly method:

  • Cross-multiply the numerators and denominators.
  • Add the results for the numerator and multiply the denominators for the bottom.
    Example: 23+34\frac{2}{3} + \frac{3}{4}:
    (2×4)+(3×3)=8+9=17(2 \times 4) + (3 \times 3) = 8 + 9 = 17, and 3×4=123 \times 4 = 12.
    So, 23+34=1712\frac{2}{3} + \frac{3}{4} = \frac{17}{12}.

7. Guess Any Number

Ask someone to think of a number and follow these steps:

  • Add 5 to their number.
  • Multiply by 2.
  • Subtract 4.
  • Divide by 2.
  • Subtract their original number.
    The answer is always 3!

8. Quick Percentage Calculation

To find x%x\% of yy, switch the numbers.
Example: 4%×75=75%×44\% \times 75 = 75\% \times 4. It’s often easier this way, and the result is the same!


9. The Multiplication Cross Pattern

To multiply two numbers close to a base (like 10, 100, etc.):

  • Subtract each number from the base.
  • Cross-subtract and multiply.
    Example: 98×9698 \times 96:
    98100=298 - 100 = -2, 96100=496 - 100 = -4.
    Cross-subtract 984=9498 - 4 = 94 or 962=9496 - 2 = 94, and multiply 2×4=8-2 \times -4 = 8.
    So, 98×96=940898 \times 96 = 9408.

10. The Power of Zeroes

If you’re multiplying numbers with trailing zeroes, multiply the significant digits first, then add the total zeroes at the end.
Example: 300×400=3×4=12300 \times 400 = 3 \times 4 = 12, and append the 4 zeroes: 120,000120,000.


Conclusion

These tricks aren’t just fun but also incredibly useful in daily life, whether you’re calculating your expenses or impressing friends with your quick math skills. Practice these a few times, and you’ll see how they make math much simpler.

What’s your favorite math trick? Let us know in the comments below!

Comments

Most visited

Does Your iPhone Battery Drain by Midday? Here’s the Game-Changing Trick You Might Be Missing!

If you’ve ever glanced at your iPhone screen in the afternoon only to find the battery hovering in the danger zone, you’re not alone. Many users believe rapid battery drain is just part of owning a smartphone. But here’s the truth — with the right tweaks, your iPhone can last far longer than you think. Why Your iPhone Battery Drains So Fast Battery life depends on multiple factors — background app activity, screen brightness, push notifications, location services, and even how you charge your phone. The problem isn’t always the battery itself, but how the phone’s resources are being used. Common culprits include: Background App Refresh constantly updating even when you’re not using them. High Screen Brightness draining power faster than you realize. Location Services running in the background for apps you barely use. Too Many Notifications waking your screen unnecessarily. The Solid Way to Boost Battery Life Apple has a feature that many people overlook — Optimized Ba...

Best Electricity Providers in New Zealand (2025) – Who Offers the Best Deal?

Choosing the right electricity provider in New Zealand isn’t just about keeping the lights on—it’s about saving money, getting better service, and even supporting renewable energy. With power prices on the rise and plenty of competition in the market, comparing your options has never been more important. In this guide, we’ll break down New Zealand’s top electricity providers in 2025 , their pricing, customer service ratings, and sustainability features—so you can find the perfect fit for your home or business. 🔌 Top Electricity Providers in NZ (2025) 1. Contact Energy Best for: Competitive pricing + renewable options Key Features: 30% renewable energy mix (hydro, wind, geothermal) $150 sign-up credit (promotional offer) Smart meter & app-based billing Solid customer satisfaction Pricing: Mid-range with bundled discounts (e.g., power + broadband) 2. Mercury Best for: 100% renewable power Key Features: 100% renewable (hydro & geothermal) No fixed-term ...

NEOM: The Futuristic Megacity Redefining Urban Living

  🌍 Introduction In a rapidly changing world, where climate resilience and innovation are not just ideals but necessities, Saudi Arabia’s NEOM project emerges as a visionary leap into the future. Touted as one of the most ambitious urban endeavors of our century, NEOM is a $500 billion megacity that promises to blend cutting-edge technology, sustainability, and luxury into a new way of living. But what exactly is NEOM—and why is the world watching? 🔍 What is NEOM? The name NEOM combines the Greek word “neo” (new) and the Arabic word “mustaqbal” (future). Announced in 2017 by Crown Prince Mohammed bin Salman , NEOM is a flagship project under Saudi Vision 2030 —the Kingdom’s bold initiative to diversify its economy and reduce dependence on oil. Spanning an area of 26,500 square kilometers along the Red Sea in northwestern Saudi Arabia, NEOM is not just a city—it’s a self-contained region of the future. Smart cities, high-tech industrial zones, luxury tourism hubs, and ...