Fill in the blank proofs for Section 2.1


  1. Claim: If n and m are odd, then m + n is even.
    Proof. Click here.
  2. Claim: If n is even, then n2 is even.
    Proof. Click here.
  3. Claim: If n is odd, then n2 - 1 is divisible by 4.
    Proof. Click here.