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New posts in decimal-expansion
Why do we miss 8 in the decimal expansion of 1/81, and 98 in the decimal expansion of 1/9801?
fractions
decimal-expansion
Can a number have infinitely many digits before the decimal point?
number-systems
decimal-expansion
The last digit of $2^{2006}$
elementary-number-theory
modular-arithmetic
arithmetic
decimal-expansion
Proof that every repeating decimal is rational
rational-numbers
number-systems
decimal-expansion
Proof that the real numbers are countable: Help with why this is wrong
real-analysis
elementary-set-theory
decimal-expansion
fake-proofs
Is $ 0.112123123412345123456\dots $ algebraic or transcendental?
decimal-expansion
transcendental-numbers
transcendence-theory
Find the last two digits of $3^{45}$
elementary-number-theory
modular-arithmetic
decimal-expansion
Derive a formula to find the number of trailing zeroes in $n!$ [duplicate]
elementary-number-theory
divisibility
factorial
decimal-expansion
Numbers $n$ such that the digit sum of $n^2$ is a square
number-theory
decimal-expansion
square-numbers
What is special about the numbers 9801, 998001, 99980001 ..?
elementary-number-theory
decimal-expansion
How do we know that Cantor's diagonalization isn't creating a different decimal of the same number?
elementary-set-theory
decimal-expansion
How to find last two digits of $2^{2016}$
elementary-number-theory
modular-arithmetic
decimal-expansion
Starting digits of $2^n$.
dynamical-systems
exponentiation
decimal-expansion
How can I prove that all rational numbers are either terminating decimal or repeating decimal numerals?
elementary-number-theory
rational-numbers
decimal-expansion
faq
Is there any mathematical reason for this "digit-repetition-show"?
number-theory
radicals
decimal-expansion
Why does an argument similiar to 0.999...=1 show 999...=-1?
sequences-and-series
arithmetic
real-numbers
p-adic-number-theory
decimal-expansion
Why $9$ & $11$ are special in divisibility tests using decimal digit sums? (casting out nines & elevens)
elementary-number-theory
modular-arithmetic
divisibility
decimal-expansion
Is it true that $0.999999999\ldots=1$?
real-analysis
algebra-precalculus
real-numbers
decimal-expansion
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