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Can anyone please suggest a book or a link to website where I can find Practice questions (and there solutions) on Number Theory. More specifically questions on the following topics:

  1. Divisibility
  2. Greatest Common Denominator
  3. Congruences
  4. Fermat's Little Theorem
  5. The RSA crptosystem
  6. El Gamal cryptosystem
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    http://www.google.co.in/url?sa=t&rct=j&q=santos%20number%20theory&source=web&cd=1&cad=rja&ved=0CDAQFjAA&url=http%3A%2F%2Fwww.fmf.uni-lj.si%2F~lavric%2FSantos%2520-%2520Number%2520Theory%2520for%2520Mathematical%2520Contests.pdf&ei=s0q6UJPEE4TqrAer2YDADA&usg=AFQjCNGoL4iUUQOyTwbW37GyRWSGlHcMzw2012-12-01

2 Answers 2