- #1
TR345
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when you take a number n=2,3,4,5,6,7,8,or 9 and multiply by 2 then mulitply the product again by two and so on. Then add the individual digits. You get interesting patterns for each number 2-9. well 2 and 4 and 8 are the same yet have no obvious patern. 7 is unique, 3 and 6 are the same and create an interesting sequence, but when it comes to 9, the sum is always a multiple of 9. 9-9,18-9,36-9,72-9, 144-9,288-18,576-18,1152-9,2304-9,4608-18 ....
If the process is repeated, will there ever be a number where the individual digits don't equal a multiple of 9.
7-7
14-5
28-10
56-11
112-4
224-8
448-16
896-23
If the process is repeated, will there ever be a number where the individual digits don't equal a multiple of 9.
7-7
14-5
28-10
56-11
112-4
224-8
448-16
896-23