Finding number of positive integers based on condition given
63383
Integers $n$ for which $|2^n + 5^n – 65|$ is a perfect square
148796
Calculating $\tau(n)$, the number of positive divisors of $n \in \mathbb N$
37800
Comparing integers: arithmetic expression or conditional expression
4221
Determining the number of bit strings of length n that contains no adjacent 0s
32544
Give an example of three positive integers m, n, and r
114404
For which positive integer values of $n$ does $a|mn-b?$
65763
Number of ways to write n as a sum of k nonnegative integers
157746
Finding all positive integer solutions to $(x!)(y!) = x!+y!+z!$
22154
Show that given a set of positive n integers, there exists a non-empty subset whose sum is divisible by n
60915
Count number of 1's in binary representation
50002
Find out number of bits needed to represent a positive integer in binary?
115258
Find all positive integers $n$ such that $\phi(n)+\sigma(n)=2n$.
77547
Find integers $a,b,c,d$ such that
27448
The Collatz conjecture algorithm applied to negative integers
28594
Number of integer solutions of the following equation
27492
Testing if given number is integer
44745
How many positive integers less than 1000 have distinct digits and are even?