Compositions of 4 positive integers summing up to 100
139039
Stars and Bars Combinatorics Problem
150536
Combinatorics, choosing 3 elements from 100
102174
Proving that all terms in sequence are positive integers (Recursive)
114404
For which positive integer values of $n$ does $a|mn-b?$
149010
Finding Combinations to the provided Sum value
53670
Prove that it is possible to choose $100$ out of the first $200$ positive integers
626
Sum of combinations with varying $n$
93572
How to determine if $n (n \geq 2)$ given numbers can be summed up to a certain number?
148906
Finding integers $m,n$ such that $(m-n)^2=4mn/(m+n-1)$
153241
Four different positive integers a, b, c, and d are such that $a^2 + b^2 = c^2 + d^2$
49234
Sum of binomial coefficients with index divisible by 4
56985
Show that every positive integer has a unique representation in the form $50k+l$...?
51555
Strictly increasing sequence $\{ a_k \}$ of positive integers such that $\sum 1/{a_k}$ is finite
91451
find all positive integer $m,n$
25338
Sum of $n$ integers from set of size $2n-1$ divides $n$
40080
Sum of multiples of $2$ coprime numbers cover positive integers
60965
Representing a nonnegative integer as the ordered sum of odd numbers