Vedic / Quicker / Shortcut Math ⇒ Topic : Divisibility of a number by 7
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Pranav
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First of all we recall the osculator for 7. Once again, for your convenience, as 7 x 3 =21 (one more than 2 x 10), our negative osculator is 2. This oscuator '2' is our key-digit. This and only this digit is used to check the divisibility of any number by 7. See how it works : | |
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