Learn faster, solve smarter!
Mathematics can be fun, especially when you know some cool tricks to solve problems quickly and accurately. Whether you’re in class 6 or preparing for board exams, these Top 10 Math Tricks will save your time and boost your confidence.
Let’s dive in!
Trick to Multiply Any Number by 5
How?
Just divide the number by 2 and add a zero at the end if it’s even. If it’s odd, subtract 1, divide by 2, and add 5 at the end.
Example:246 × 5 = (246 ÷ 2) = 123 → 1230137 × 5 = (136 ÷ 2 = 68) → 685
Also Read: Quick Multiplication Techniques for Beginners
2️⃣ Easy Square of Numbers Ending with 5
Formula: (n5)² = n × (n + 1) followed by 25
Example:25² = 2 × 3 = 6 → 62575² = 7 × 8 = 56 → 5625
3️⃣ Divisibility Rule for 3
Tip: Add the digits of the number. If the sum is divisible by 3, so is the number.
Example:456 → 4+5+6 = 15 → divisible by 3
4️⃣ Multiplying Two-Digit Numbers (Between 11 and 19)
Method: Add the unit digit of the second number to the first number, then multiply by 10 and add the product of the unit digits.
Example:13 × 14 → (13 + 4) × 10 + (3×4)17 × 10 = 170, 3×4=12 → 170 +12 = 182
Explore More: Math Notes and Formulas – Free PDF Download
5️⃣ Finding Square of Numbers Close to 100
Formula: (100 ± x)² = 10000 ± 200x + x²
Example:98² = (100 - 2)² = 10000 - 400 + 4 = 9604102² = 10000 + 400 + 4 = 10404
6️⃣ Quick Percent Calculation
Tip: 10% of a number = move decimal one place left
Example:10% of 450 = 45
Also:5% = 10% ÷ 2 → 5% of 450 = 22.5
7️⃣ Doubling and Halving Trick
For multiplication: double one number, halve the other.
Example:16 × 25 → 8 × 50 → 4 × 100 = 400
8️⃣ Magic of 9’s Multiplication
Tip: The sum of digits in the product of 9 × any number (1-10) is 9.
Example:9 × 7 = 63 → 6+3 = 9
9️⃣ Check if a Number is Divisible by 11
Tip: Alternate sum of digits → divisible by 11?
Example:121 → 1-2+1=0 → divisible by 11
🔟 Multiplying by 11
Tip: For two-digit numbers: add digits, put in the middle.
Example:23 × 11 → 2_(2+3)_3 → 253
🎯 Final Tips
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Practice these tricks daily.
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Use them during exams for speed.
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Share them with friends and make math fun!
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Download Free Math Worksheets
Practice these tricks with free printable worksheets from Click here to download!