Ramanujan’s puzzling problem
13617
Evaluating the nested radical $ \sqrt{1 + 2 \sqrt{1 + 3 \sqrt{1 + \cdots}}} $.
129930
A problem on chinese remainder theorem (CSIR NET DEC 2015)
107964
Simple combinatorics problem.
131941
Solve quadratic congruences.
84696
Finding Ramanujan's taxicab numbers
132070
A challenge on the parabola
42754
Modular arithmetic: division, fractions, solving linear congruences
152231
Computing the product of p/(p - 2) over the odd primes
27448
The Collatz conjecture algorithm applied to negative integers
57275
On the primality of integers of the form $p^2+k$
146053
Proving identities (mod $pq$) using Fermat's little theorem?
108035
solving diophantine equations using congruences
129381
Modular equation problem
47596
An infinite series plus a continued fraction by Ramanujan
94327
Cubic Diophantine with two variables
140632
A problem on Binomial Theorem
6700
An Olympiad problem in prime numbers :can we proof that "n" is prime in this case "