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Anything special about the number 9?

Donald Ward

in Schools

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Amanda Johnson on July 30, 2019

Yes....What is special about the #9 is that..........If the back becomes a 6......and.......it is a composite number......which means that you can be equally divided at numbers other than 1 and itself.....That other number is 3. ALSO... If you are still adding all the digits of any of the multiples of 9 (including their intermediate sums) - finally add up to 9. Examples: 18 is decomposed in: 1 + 8 adds up to 9 or 27 breaks down to: 2 + 7 adds up to 9 or 5110092 (which is 9 x 567788) decomposes in: 5+1+1+0+0+9+2 adds up to 18, which breaks down into 1 + 8, which adds up to 18, in which sum (guess what!) 9. Try it yourself with any multiple of 9!


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