Question

Do you know any good online resources for learning number theory? Ideally with exercises + solutions one can check the results against!

Answer 1

http://www.math.niu.edu/~rusin/known-math/index/11-XX.html
try this one just found it.

Answer 2

Thanks, I'll take a look. Don't consider the question closed. :)

Answer 3

Ok sounds good

Answer 4

http://www.mathgoodies.com/worksheets/number_theory_wks.html
there's also this website with some worsheets (PDF format) don't know how close to what you want they are but you can look

Answer 5

Yes, I've noticed them. Seem a little bit too easy though.. :-) Thanks!

Answer 6

You could try this one .. looks more complicated... hope I helped.
http://www.tutorvista.com/content/math/number-theory/question-answers1-4.php#section1

Answer 7

Thanks again!

Answer 8

Ya hope it was helpful

Answer 9

mit open course, assignments, tests, solutions http://ocw.mit.edu/courses/mathematics/18-781-theory-of-numbers-spring-2003/