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Activity Discussion Math Digit Sum Pattern: Multiplying by 9

  • Digit Sum Pattern: Multiplying by 9

    Posted by Suryansh on June 24, 2023 at 1:11 pm

    I noticed that when I multiply a number by 9 and add the digits of the result together, I always get 9. Is this true for all numbers? Can you explain why or why not?

    Suryansh replied 3 months, 1 week ago 1 Member · 0 Replies
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