Question

Number of pairs of prime numbers whose sum equals 999

Answer 1

I know the answer is:

997+2=999997+2=999 so all you would have to do is multiply 997997 and 2

Answer 2

Answer:

Number of pair is 1 i.e. ( 2 , 997 )

Step-by-step explanation:

As we know sum of two numbers can be odd if and only if one number is an  even number and the other number is an odd number.  So the pair will have one even and one odd number

We also know that, there is only one even prime number which is 2 .

So one number is 2

Now,

The sum should be equal  to 999

Let the other number of pair be n

2 + n = 999

n = 999 - 2

n = 997

Hence,

There is one pair of numbers ( 2, 997 ) whose sum is 999