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How can i count number of digits in tetrated numbers?

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#decimal-expansion #tetration
442
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Finding the $1000$-th decimal of $\sqrt{1111...111}$

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#calculus #radicals #decimal-expansion
551
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Calculating last digit of a number using binomial theorem

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#binomial-theorem #number-systems #decimal-expansion
184
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Should we say $0.\bar9$ *can* equal $1$ also in the hyperreals?

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#decimal-expansion #nonstandard-analysis
286
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Write $0.2154154\overline{154}$ as a fraction

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#number-theory #rational-numbers #decimal-expansion
1.3k
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Find last digit of $7^{7^{7^7}}$

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#elementary-number-theory #modular-arithmetic #decimal-expansion
68
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Series of digits in a number

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#elementary-number-theory #decimal-expansion
3.2k
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Repeating decimals linked to reciprocals of primes

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#elementary-number-theory #decimal-expansion
254
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Where, if ever, does the decimal representation of $\pi$ repeat its initial segment?

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#irrational-numbers #pi #decimal-expansion
2.4k
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What formulas are available to find the nth digit of a number?

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#soft-question #closed-form #real-numbers #decimal-expansion
151
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Are there methods to recursively calculate the decimal expansion of real numbers?

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#closed-form #real-numbers #fractals #decimal-expansion
2.4k
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Maximum length of repeating digits in a decimal

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#decimal-expansion
4.5k
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Is there any kind of known pattern to $\sqrt 2$ in base 2?

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#binary #decimal-expansion
847
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Prove that in every sequence of 79 consecutive positive numbers written in decimal system there is a number whose sum of the digits is divisible by 13

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#number-theory #modular-arithmetic #contest-math #pigeonhole-principle #decimal-expansion
280
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If $n$ is a square, can $n$ consist of only odd digits?

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#number-theory #elementary-number-theory #decimal-expansion

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