4 points
Phew, for a moment I worried that 2.9999… was divisible by 7 and I woke up in some kind of alternate universe
8 points
Can we just say it isn’t? Like that’s an exception, and then the rest of math can just go on like normal
3 points
So what? Being a prime number doesn’t mean it can’t be a divisor. Or is it the string of 9s that’s supposed to be upsetting? Why? What difference does it make?
15 points
Thanks, Satan
10 points
*
2 points
With 17, I understand that you’re referring to how 299,999 is also divisible by 17. What is the 51 reference, though? I know there’s 3,999,999,999,999 but that starts with a 3. Not the same at all.
1 point
60 points
*
⅐ = 0.1̅4̅2̅8̅5̅7̅
The above is 42857 * 7, but you also get interesting numbers for other subsets:
7 * 7 = 49
57 * 7 = 399
857 * 7 = 5999
2857 * 7 = 19999
42857 * 7 = 299999
142857 * 7 = 999999
Related to cyclic numbers:
142857 * 1 = 142857
142857 * 2 = 285714
142857 * 3 = 428571
142857 * 4 = 571428
142857 * 5 = 714285
142857 * 6 = 857142
142857 * 7 = 999999
