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Activity › Discussion › Math › Digit Sum Pattern: Multiplying by 9

  • Math

    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 1 year, 10 months ago 1 Member · 0 Replies
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