In the first term of 2012/2013 I taught an introductory course on number theory at Warwick.

Here are the exercise sheets for the course:

• Exercise sheet 1 - revision of divisiblity of integers, and some miscellaneous fun exercises.
• Exercise sheet 2 - congruences, Chinese Remainder Theorem, Fermat's Little Theorem, etc.
• Exercise sheet 3 - Euler's Theorem, primitive roots.
• Exercise sheet 4 - quadratic residues, quadratic reciprocity.
• Exercise sheet 5 - p-adic numbers.
• Exercise sheet 6 - more p-adic numbers, geometry of numbers and quadratic forms.
• Exercise sheet 7 - Hensel's lemma, ternary and binary quadratic forms.
• Exercise sheet 8 - Positive definite binary quadratic forms.