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Question

Express the following as the sum of two odd primes: 24
[2 marks]

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Solution

Here take a look at 24, it is an even number

Now we can get an even number by adding two even numbers, but we only have 2 as an even prime number, so this case fails.

Now if we add two odd numbers we can get an even number

So the possible cases are:

7 + 17 = 24
[1 mark]
5 + 19 = 24
[1 mark]

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