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# Express 18 as the sum of two prime numbers in all possible ways.

**Given :**

The given number is 18.

**To do :**

We have to express 18 as the sum of two prime numbers in all possible ways.

**Solution :**

**Prime number :**

A number which has exactly two factors (1 , itself ).

$5 + 13 = 18, 13 + 5 = 18$

$7 + 11 = 18, 11 + 7 = 18$

5 , 7 , 11 , 13 are prime numbers.

These are the possible ways, in which 18 can be expressed as the sum of two prime numbers.

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