Exercise 23 of Rudin chapter 8
104512
Why is $\frac{1}{2\pi i}\int_{\gamma}\frac{f'(z)}{f(z)}dz$ an integer?
144211
a second course in abstract algebra
127330
Exercises on Galois Theory
36805
Simple chessboard exercise
126094
Hartshorne Algebraic Geometry Exercise II.2.16.
28252
How many homomorphisms are there from $\Bbb Z_{20}$ onto $\Bbb Z_{8}$? How many are there to $\Bbb Z_{8}$?
132280
Let $G$ be a group of order 35. Show that $G \cong Z_{35}$
152630
showing that a group of order 45 is abelian
39201
Atiyah-Macdonald, Exercise 5.4
108385
Irreducible factors of $x^8 - x$ in $Z/2Z[x]$
107964
Simple combinatorics problem.
120010
Show that $\aleph_{\alpha}^{\aleph_{1}} = \aleph_{\alpha}^{\aleph_{0}}\cdot 2^{\aleph_1}$
79460
Atiyah-Macdonald, Exercise 8.3: Artinian iff finite k-algebra.
103538
Partitions of $n$ into distinct odd and even parts proof
39096
Primitive elements of GF(8)
102432
Irreducible polynomial of degree $8$
42883
Cross product in $\mathbb R^n$