Trick 567 - Find Sum of First 'n' Multiples in 5 Seconds

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Shortcuts to do calculations mentally, useful for developing numerical aptitude and for success in competitive examinations.....watch this video to learn how to find the sum of first 'n' multiples of any number within 5 seconds.....very important for class IX and above students and those preparing for competitions.....for more videos, keep visiting:
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sir i think if you start teaching in hindi then you will be get famous soon

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