Question

the sum of two prime numbers is 999. what is their product

Answer 1

Let be first prime no.=x
Let be second prime no.=
x+x=999
2x=999
x=999/2
x=499.5
499.5×499.5
=249,500.25

Answer 2

The sum of two prime numbers is 999. Then the product is 1994

Solution:

Given,

The sum of two prime numbers is 999

Prime number :  number that is divisible only by itself and 1

Sum = 999

We know that,

The sum will given an odd number when at least one number is even

In prime numbers , only 2 is an even prime

Thus,

2 + x = 999

x = 999 - 2

x = 997

997 is also a prime number

Thus two numbers are : 2 and 997

what is their product

$2 \times 997 = 1994$

Thus the product is 1994

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