Question

Write 55 as the sum of two primes.

Answer 1

We have to write 55 as the sum of two primes.

Now, 55 is an odd number.

When an odd number is to be expressed as the sum of two numbers, then one number must be odd and one must be even.

[This is because of the fact that both odd numbers or both even numbers add up to an even number].

Now, we realise

55=odd number + even number

Now, both of these numbers have to be prime.

We know that an even number is prime, only if it is 2.

So, 2 is one number; and therefore the other number mut be 55-2, ie. 53.

The answer is

55, can be expressed as the sum of two prime numbers, 2 and 53.

55=2+53.