New posts in Decimal Expansion

How many numbers have the form $10n+d$ where $d$ is a non-zero digit?

Rational number with more than ten digits

How can you show by hand that $ e^{-1/e} < \ln(2) $?

Binary expansion of rational numbers

Observation about multiples of $999$

The integral of $f(0.x_1 x_2 \cdots)= 0.\sigma(x_1)\sigma(x_2)\cdots$

Are there any irrational/transcendental numbers for which the distribution of decimal digits is not uniform?

Can we prove that infinite many primes begin with any given digitstring?

Find all three digit numbers which are divisible by groups of its digits

Repeatedly dividing $360$ by $2$ preserves that the sum of the digits (including decimals) is $9$