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What would be a good book to learn basic number theory? If possible a book which also has a collection of practice problems? Thanks.

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You might want to peruse this listing:… – Amzoti Apr 4 '13 at 5:33
A good place to start might be here: – user47805 Apr 4 '13 at 5:35
You might also want to peruse:… – Amzoti Apr 4 '13 at 5:40
It depends on what level you seek and what you already know. – lhf Apr 4 '13 at 12:36
Right now I am in AP calculus AB. – Ovi Apr 5 '13 at 0:39
up vote 3 down vote accepted

My two-pennyworth:

  1. John Stillwell, Elements of Number Theory (Springer 2002). This is by a masterly expositor, and is particularly approachable.
  2. G.H. Hardy and E.M. Wright, An Introduction to the Theory of Numbers (OUP 1938, and still going strong with a 6th edition in 2008). Also aimed at beginning undergraduate mathematicians and pleasingly accessible.
  3. Alan Baker, A Comprehensive Course in Number Theory (CUP 2012) is a nice recent textbook (and a lot shorter than its title would suggest, too).
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Thanks. Number two seems to be on my level (taking AP calculus AB at the moment), but what about the other ones? – Ovi Apr 5 '13 at 0:38

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