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inkyvoyd
 4 years ago
for any positive natural number n that has a prime factorization without the numbers {2,5}is it possible to multiply it by another number such that the result is a string of nines? note that the number of nines does not matter, what matters is that the result is just nines.
inkyvoyd
 4 years ago
for any positive natural number n that has a prime factorization without the numbers {2,5}is it possible to multiply it by another number such that the result is a string of nines? note that the number of nines does not matter, what matters is that the result is just nines.

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inkyvoyd
 4 years ago
Best ResponseYou've already chosen the best response.0for 1  1*9=9 for 3: 3*3=9 for 7: 7*7=49 for 9: 9*1=9

inkyvoyd
 4 years ago
Best ResponseYou've already chosen the best response.0for 11: 11*9=99 for 13: 13*?=????

inkyvoyd
 4 years ago
Best ResponseYou've already chosen the best response.0The issue with this question is how to find such a given number

inkyvoyd
 4 years ago
Best ResponseYou've already chosen the best response.0for 7: 7*142857=999999

inkyvoyd
 4 years ago
Best ResponseYou've already chosen the best response.0Btw, I think I'll make this my problem of the day. It's simple math washed up a little so you don't recognize it.
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