Modular arithmetic question square
3563
Find all roots of $\,x^2\!\equiv x\pmod{\!900}$, i.e all idempotents in $\Bbb Z_{900}$
129755
Weighted sum of squares, in a finite field
38727
Modular Exponentiation and Primes
139776
Divisibility tests and remainder mod $9,11,99,101,999,1001\,$ (casting out nines and elevens)
158684
How to solve and see resolution of $13^{53} \pmod 7$ using Fermat little Theorem?
47060
Split $n$ into nontrivial factors via a nontrivial square-root of $1\!\pmod{\!n}$
127945
Number of solutions to the congruence $x^q \equiv 1 \mod p$.
153647
Elementary number theory and quadratic
22053
Modular Arithmetic - Pirate Problem
129381
Modular equation problem
155012
Solving quadratic equations in modular arithmetic
67332
Sum of two squares modulo p
131395
Solving linear congruence $2x + 11 \equiv 7 \pmod 3$
31162
What is the meaning of modular fractions?
134450
Chinese Remainder Theorem $\ x\equiv m_k-2\pmod{m_k}$
109490
Modular arithmetic problem (mod $13$)
108035
solving diophantine equations using congruences