Is it possible to write 1 as the sum of the reciprocals of x odd integers? x is the odd number.
140359
Can the sum of finitely many inverses of distinct odd integers $\geq 3$ be 1?
94983
Can an odd number $n$ divide $2^n-1$?
18064
Sum of reciprocals of numbers with certain terms omitted
60847
What three odd integers have a sum of 30?
143343
The series of reciprocals of the integers that do not contain 9 in their decimal representation
4559
How many ways can $133$ be written as sum of only $1s$ and $2s$
113331
Number of ways a natural number can be written as sum of smaller natural number
85272
$3x + 1$ is even iff $5x-2$ is odd
91069
Express an even number as a sum of primes
50133
The sum of odd powered real numbers equals zero implies the numbers are inverses
156646
If $x$ is rational then $\,x+\frac{1}x \,$ is an integer $\iff x = \pm 1$
65763
Number of ways to write n as a sum of k nonnegative integers
42289
prove that there are infinitely many numbers of the form $x = 111....1$ such that $31\mid x$
142882
Can the factorial function be written as a sum?
114796
Direct proof that the product of odd integers is odd
91951
How do I check if an integer is even or odd?
20443
Calculate sum of squares of first $n$ odd numbers