Express $18$ as the sum of two primes?

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Solution

Expressing $18$ as the sum of two primes:
Prime Numbers: The numbers which have only two factors $1$ and the number itself are called Prime Numbers.
Since, $18 = 13 + 5$
or $18 = 11 + 7$
So, $18$ can be expressed as sum of $13$ and $5$ or $11$ and $7$

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