Math Tricks That Will Blow Your Mind

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10 Secret Shortcuts That Make You Faster Than a Calculator

Why These Math Tricks Will Change Your Life

Did you know that EdmusingShield’s expert math teachers in Mumbai, Pune, and Bangalore have taught these amazing tricks to thousands of students? These are the same secrets used by math olympiad winners and competitive exam toppers.

1. The Amazing 11 Rule – Multiplying by 11

This trick will teach you to multiply by 11 in seconds! It’s so fast, you’ll beat the calculator.

Let’s multiply: 23 × 11 = ?

  • Step 1: Separate the digits → 2 __ 3
  • Step 2: Add them → 2 + 3 = 5
  • Step 3: Place between → 2 5 3

Answer: 23 × 11 = 253 ✨

Practice Time:
Try these: 34 × 11, 52 × 11, 71 × 11
Answers: 374, 572, 781

⚙️ When There’s a Carry (Sum ≥ 10)

If the middle sum is 10 or more, write only the ones digit in the middle and add 1 to the first digit.

67 × 11 = ?

  • Step 1: Separate → 6 __ 7
  • Step 2: Add → 6 + 7 = 13
  • Step 3: Place 3 in middle, add 1 to first digit → 7 3 7

✅ 67 × 11 = 737

Test This Trick: 11 Rule
45 × 11 = ?
( ) 455
(x) 495
( ) 505
( ) 545

2. Lightning Fast Multiplication by 5

Multiplying any number by 5 is now possible in 1 second. This is EdmusingShield’s most popular trick.

Let’s multiply: 38 × 5 = ?

  • Step 1: Divide by 2 → 38 ÷ 2 = 19
  • Step 2: Add a zero → 190

Answer: 38 × 5 = 190

For odd numbers: Divide, round down, add 5 at the end

37 × 5 = ?
37 ÷ 2 = 18.5 → Round down to 18
Add 5 at end → 185

Test This Trick: Multiply by 5
64 × 5 = ?
( ) 310
(x) 320
( ) 330
( ) 340

3. The Mind-Blowing 99 Addition Trick

Adding 99 will now be instantaneous. This trick blows students’ minds.

Let’s add: 456 + 99 = ?

  • Step 1: Add 100 instead → 456 + 100 = 556
  • Step 2: Subtract 1 → 556 - 1 = 555

Answer: 456 + 99 = 555

Test This Trick: 99 Addition
278 + 99 = ?
( ) 367
(x) 377
( ) 387
( ) 397

4. Squaring Numbers Ending in 5 (Viral Trick)

This trick is going viral on social media. Find the square of numbers ending in 5 in seconds.

Let’s square: 75² = ?

  • Step 1: Take first digit → 7
  • Step 2: Multiply by next number → 7 × 8 = 56
  • Step 3: Add 25 at end → 5625

Answer: 75² = 5625

Challenge:
Can you solve 95² in 3 seconds?
Answer: 9 × 10 = 90, add 25 → 9025

Test This Trick: Square Numbers Ending in 5
65² = ?
( ) 4025
(x) 4225
( ) 4325
( ) 4525

5. The Magic 9 Pattern

The hidden magic pattern in the 9’s table. This trick will make you an expert in calculations with 9.

Magic in the 9’s table:

  • 9 × 1 = 09 → 0 + 9 = 9
  • 9 × 2 = 18 → 1 + 8 = 9
  • 9 × 3 = 27 → 2 + 7 = 9
  • 9 × 4 = 36 → 3 + 6 = 9

Pattern: The sum of the digits of every answer is always 9!

Test This Trick: Magic 9 Pattern
9 × 7 = ?
( ) 53
( ) 56
(x) 63
( ) 73

6. Divisibility by 7 (Advanced)

This trick is very useful in competitive exams. Instantly find out if a number is divisible by 7.

Is 343 divisible by 7?

  • Step 1: Remove last digit → 34 (removed 3)
  • Step 2: Double the removed digit → 3 × 2 = 6
  • Step 3: Subtract → 34 - 6 = 28
  • Step 4: 28 ÷ 7 = 4 → Yes, divisible

Test This Trick: Divisibility by 7
Is 154 divisible by 7?
(x) Yes
( ) No

7. Left to Right Addition

Instead of the traditional right-to-left, add from left-to-right. This method will make you faster than a calculator!

Let’s add: 847 + 695 = ?

  • Step 1: Add hundreds → 800 + 600 = 1400
  • Step 2: Add tens → 40 + 90 = 130
  • Step 3: Add units → 7 + 5 = 12
  • Step 4: Total → 1400 + 130 + 12 = 1542

Answer: 847 + 695 = 1542

Test This Trick: Left to Right Addition
523 + 348 = ?
( ) 861
(x) 871
( ) 881
( ) 891

8. Complement Method for Subtraction

A genius method to convert subtraction into addition. This trick makes mental math super easy.

Let’s subtract: 1000 – 387 = ?

  • Step 1: Find complement of 387 to 1000
  • Step 2: 1000 - 387 = 613
  • Shortcut: 9-3=6, 9-8=1, 10-7=3 → 613

Answer: 1000 – 387 = 613

Test This Trick: Complement Method
1000 - 456 = ?
( ) 534
(x) 544
( ) 554
( ) 564

9. Percentage Calculations

Calculating percentages is now possible in seconds. Useful everywhere, from shopping discounts to exam marks.

Find: 15% of 240 = ?

  • Step 1: 10% of 240 = 24
  • Step 2: 5% of 240 = 12 (half of 10%)
  • Step 3: Add them → 24 + 12 = 36

Answer: 15% of 240 = 36

Test This Trick: Percentage Calculations
25% of 160 = ?
( ) 30
( ) 35
(x) 40
( ) 45

10. The Amazing Digital Root Trick

Find the digital root of any large number instantly. This trick is super useful in numerology and competitive exams.

Find digital root of: 9875 = ?

Method 1 (Traditional): Add all digits repeatedly

  • 9 + 8 + 7 + 5 = 29
  • 2 + 9 = 11
  • 1 + 1 = 2

🚀 Lightning Method: Use remainder trick

  • 9875 ÷ 9 = 1097 remainder 2
  • If remainder = 0, then digital root = 9
  • Otherwise, digital root = remainder

Digital Root of 9875 = 2

Quick Challenge:
Find digital root of: 12345, 999, 1000
Answers: 6, 9, 1

Where is this used?

  • Check calculations: Digital root of answer should match
  • Divisibility tests: Quick way to check if number is divisible by 9
  • Competitive exams: Fast verification of answers
  • Fun party trick: Impress friends with instant calculations

Test Your Digital Root Skills
Let’s see if you mastered the amazing digital root trick

What is the Digital Root of 12345?
( ) 3
( ) 5
(x) 6
( ) 9

Quick Tip:
12345 ÷ 9 = 1371 remainder 6, so Digital Root = 6!

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    • Math Programs: CBSE | ICSE | IGCSE & IB | IIT-JEE | NEET | Vedic Maths

Why Do These Math Tricks Actually Work?

These aren’t just magic tricks – they’re based on solid mathematical principles. At EdmusingShield, our expert teachers explain the “why” behind every shortcut, so you understand the concept completely.

Benefits of Learning These Tricks:

  • ✅ Boost Exam Speed: Solve 3x more problems in the same time
  • ✅ Build Confidence: No more math anxiety or fear
  • ✅ Improve Mental Math: Calculate without pen and paper
  • ✅ Competitive Edge: Excel in JEE, NEET, banking exams
  • ✅ Daily Life Skills: Quick calculations for shopping, discounts
  • ✅ Impress Everyone: Become the math genius in your group

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