How many solutions are there to the equation $na\equiv _m0$ for $0\leq a <m$?
42754
Modular arithmetic: division, fractions, solving linear congruences
107448
proving that there is no solution for $n$ in positive integers except $n = 1$ for $2^n = nk + 1$
9143
Solve $u_{xx}-3u_{xt}-4u_{tt}=0$ where $u(x,0)=x^2$ and $u_t(x,0)=e^x$
14773
Finding distinct solutions for the equation
82137
Given a, b How many solutions exists for x, such that: $a \bmod{x}=b $
33315
Many other solutions of the Cauchy's Functional Equation
77595
Number of solutions of $x_1 + 2x_2 + 3x_3 + \cdots + n x_n = p$
33314
How many non-negative integer solutions does $x_1+x_2+\cdots+x_n=A$ have?
73478
Show that the equation $a_1e^{\alpha_1x} + a_2e^{\alpha_2x} + \cdots + a_ne^{\alpha_nx} = 0$ has at most $n - 1$ real roots.
18477
$(W_1+W_2+\cdots+W_n)^a \leq W_1^a +\cdots + W_n^a$ for $n$ integer, $n\geq 2$, $W\gt 0$ and $a$ constant, real, $0\lt a\lt 1$
156542
Number of solutions to $a_1 + a_2 + \dots + a_k = n$ where $n \gt 0$ and $0 \lt a_1 \leq a_2 \leq \dots \leq a_k$ are integers.
40343
Solutions of $p!q! = r!$
94965
Solve $x\equiv 1\pmod2$, $x\equiv 2\pmod3$, $x\equiv 3\pmod4$, $x\equiv 4\pmod5$, $x\equiv 5\pmod6$ and $x\equiv 0\pmod7$
24837
$x^2+1=0$ uncountable many solutions
38379
Showing that $e^z=z$ has infinitely many solutions
69839
Prove that a system of linear equations, will have infinitely many solutions whenever there is a specific value.
8902
Can Gaussian elimination find a zero vector when $m < n$?