Herstein's Topics in Algebra Section $2.3$ Problems $12$ and $13$
57105
Probs. 12 & 13 , Sec. 2.3, in Herstein's TOPICS IN ALGEBRA, 2nd ed: Existence of only right-sided identity and right-sided inverses suffice
109490
Modular arithmetic problem (mod $13$)
126094
Hartshorne Algebraic Geometry Exercise II.2.16.
93773
How many elements are in the quotient ring $\frac{\mathbb Z_3[x]}{\langle 2x^3+ x+1\rangle} $
23523
Two problems on number theory
112165
Classification of groups of order 12
104072
Standard graded algebra
42213
Computing $\text{Gal}(\mathbb{Q}^{ab}/\mathbb{Q})$
153647
Elementary number theory and quadratic
18302
List the primes for which the following system of linear equations DOES NOT have a solution in $\mathbb{Z}_p$
74150
Problem on the number of generators of some ideals in $k[x,y,z]$
34906
Showing $[\mathbb{Q}(\sqrt[4]{2},\sqrt{3}):\mathbb{Q}]=8$.
94179
Problems on Cyclotomic Polynomials
19525
Showing field extension $\mathbb{Q}(\sqrt{2}, \sqrt{3}, \sqrt{5})/\mathbb{Q}$ degree 8
152306
Finding homomorphisms from $\mathbb Z_{12}$ to $\mathbb Z_{6}$.
74058
Sums and products of algebraic numbers
25290
Determine the number of irreducible monic polynomials of degree 3 in $\mathbb F_p[x]$