Question

show that for every natural number n≥12 can be expressed as sum of 2 composite numbers

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Answer 1

Step-by-step explanation:

If n is even, then n is of the form 2k where k≥6. Hence n=2(k−4)+8. Which is a composite number

And if n is odd, then n is of the form 2k+1 where k≥5. hence n=2(k−4)+9.

Thus any number >11 can be expressed as the sum of two composite numbers