Thursday, 10 January 2013

(Bonus Question) Primes... Why? Why? Why?

Follow-up from the discussion on 9 January 2013 (Wednesday), Notes p2 Q5

Add any two primes greater than 2, we will get an even number.
Explain clearly, using algebra on why the result is always an even number.

Afternote: This was the discussion we had in class


  1. because if a is an even number and b is an odd number, then
    b + b =
    a + a + 1 + 1 =
    a + a + 2
    and since a is an even number and 2 is also an even number, t tal will be an even number.

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