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Elementary way to prove that if $n$ and $10$ are coprime, then $1/n$ has no transient digits.

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#elementary-number-theory #decimal-expansion
452
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Understanding decimal number system

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#decimal-expansion #number-systems
98
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Can the b-ary power series of an irrational number evaluate to a rational number?

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#number-theory #power-series #irrational-numbers #decimal-expansion #rationality-testing
139
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Can this heuristic argument be useful to prove: Sum of digits of $a^b$ equals $ab$ conjecture?

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#number-theory #asymptotics #decimal-expansion #conjectures
1k
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Call a number "holy" if it contains no $666$ in its decimal expansion. Are there infinitely many holy powers of $2$?

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#sequences-and-series #decimal-expansion
19
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Smallest Harshad base

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#sequences-and-series #prime-numbers #decimal-expansion
1.1k
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What is $\tau$ in base $12$?

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#geometry #pi #decimal-expansion
1.1k
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Permuting digits in a power of $2$

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#number-theory #exponentiation #decimal-expansion
370
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If 0.99...=1 What about 0.89...=0.9?

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#sequences-and-series #decimal-expansion #infinitesimals
5.5k
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How do you calculate how many decimal places there are before the repeating digits, given a fraction that expands to a repeating decimal?

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#fractions #decimal-expansion
4.6k
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Digits difference of numbers between 10 and 99

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#decimal-expansion
1.4k
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Conversion from decimal to unknown number system

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#decimal-expansion
366
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Equal number of 1s and 0s in number of n digits

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#infinity #binary #decimal-expansion
1.5k
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Why irrational implies having an infinite decimal expansion?

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#elementary-number-theory #decimal-expansion
218
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The Number of The 0's in a Factorial

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#elementary-number-theory #divisibility #factorial #decimal-expansion #parity

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