10 Math Tricks That’ll Blow Your Friends’ Minds

🧭 Category: Mathematics | Fun Learning | Education

Learn 10 incredible math tricks that make you calculate faster than a calculator! Impress your friends and master mental math with these easy hacks.

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🧠 Introduction

Do you know you can multiply, divide, or find squares faster than your calculator? These quick math tricks will make you look like a genius — and make your friends ask, “How did you do that?!”

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⚡ 1. Multiply Any Number by 11

Example: 

$32 × 11$

→ Add the digits (3 + 2 = 5)

→ Place the sum between them → 352

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⚡ 2. Square Numbers Ending in 5

Example: 

$35² = ?$

→ Multiply the first digit by its next → 3 × 4 = 12

→ Add 25 → 1225

⚡ 3. Dividing by 5

Multiply by 2 and move the decimal one place left.

Example: 

$235÷5=47.0$

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⚡ 4. Multiply by 9 in Seconds

$$48×9=(48×10)−48= (48×10)−48= 432

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⚡ 5. Find 15% of Any Number

10% + half of that = 15%.

Example: 15% of 80 = 8 + 4 = 12

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⚡ 6. Square a Number Near 100

$97² = (100 - 3)(100 + 3) = 10000 - 9 = 9991$

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⚡ 7. Multiply by 25

Divide by 4 and add two zeros.

$64\times 25=\mathrm{<span\; class="base"\; style="text-align:\; justify;"><span\; class="strut"></span><span\; class="mord">1600</span></span>}$

⚡ 8. Quick Divisibility Rules

• 3 → digits sum divisible by 3

• 4 → last two digits divisible by 4

• 9 → digits sum divisible by 9

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⚡ 9. Percentage to Fraction Quick Table

Percentage	Fraction
50%	½
25%	¼
75%	¾
20%	⅕

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⚡ 10. Fast Estimation Hack

Round and adjust:

$198 × 5 ≈ 200 × 5 = 1000 - 10 = 990$

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💬 Conclusion

Math isn’t magic — it’s patterns! Practice these daily and watch your speed multiply.