- Why does this pattern occur: $123456789 \times 8 + 9 = 987654321$
Why does this pattern occur: $123456789 \times 8 + 9 = 987654321$ Ask Question Asked 5 years, 11 months ago Modified 2 years ago
- Puzzle - 123456789 = 100 with three operations?
Given the sequence 123456789: You can insert three operations ($+$,$-$,$\\times$,$ $) into this sequence to make the equation = 100 My question is: is there a way to solve this without brute forc
- Why is $\frac {987654321} {123456789} = 8. 0000000729?!$
Many years ago, I noticed that $987654321 123456789 = 8 0000000729\\ldots$ I sent it in to Martin Gardner at Scientific American and he published it in his column!!! My life has gone downhill si
- soft question - Construct numbers using digits $123456789$ and the . . .
Construct numbers using digits $123456789$ and the operations $+,-,×,÷$ Ask Question Asked 11 years, 2 months ago Modified 11 years, 2 months ago
- $12345679$ and friends - Mathematics Stack Exchange
As an additional note, it is in fact true that the multiples of $123456789$ (note! not $12345679$ which I explained above) that are relatively prime to $9$ also result in a permutation of those digits (including 0 when you reach 10 digits): $$1 \times 123456789 = 123456789$$ $$2 \times 123456789 = 246913578$$ $$4 \times 123456789 = 493827156$$ $$5 \times 123456789 = 617283945$$ $$7 \times
- Number theoretic puzzle involving 123456789 - Mathematics Stack Exchange
Number theoretic puzzle involving 123456789 Ask Question Asked 7 years, 8 months ago Modified 7 years, 8 months ago
- Does $\pi$ contain the combination $ 1234567890$? [closed]
In the first 1 billion digits of $\pi$, I found two instances of $123456789$, but no instances of $1234567890$ Here's a simple example In the first billion digits, there were $10049$ instances of $12345 $ There were $969$ instances of $123456$ There were $97$ instances of $1234567$ There were $9$ instances of $12345678$
- Why does $987,654,321$ divided by $123,456,789 = 8$?
Why does $987,654,321$ divided by $123,456,789 = 8$? Is it a coincidence or is there a special reason? Note: The numbers are a mirror of each other
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