Multiply by 19 & 21 in Seconds 🔥 | Fast Maths Trick | PEARL INSTITUTE BATALA
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About this short
Learn two powerful multiplication shortcut tricks to calculate faster in competitive mathematics.
✅ Multiply by 19: Multiply by 20 and subtract the original number
Example: 48 × 19 = 912
✅ Multiply by 21: Multiply by 20 and add the original number
Example: 36 × 21 = 756
Perfect for students preparing for Punjab Police, SSC, Banking, Railway, Army, BSF and other competitive exams.
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