624
To calculate two-thirds of a sum, you first find the sum of the numbers. Then, you multiply the sum by 2/3, which is the same as multiplying the sum by 2 and dividing by 3. This will give you the result of two-thirds of the sum. For example, if the sum is 15, two-thirds of the sum would be (15 x 2) / 3 = 10.
You can't write that as the sum of two prime numbers. Note: Goldbach's Conjecture (for expressing numbers as the sum of two prime numbers) applies to EVEN numbers.
the sum of two numbers is
If you multiply two prime numbers, the product (result) will be a composite number, not a prime number. A prime number has exactly two factors, 1 and itself. The product of two prime numbers will have those two numbers as factors, as well. The sum of two prime numbers might be prime if one of those two numbers is 2, the only even prime number, but otherwise it will not be a prime because two odd numbers will have an even sum, which means it is divisible by 2. Examples: 2 + 3 = 5 (prime) 3 + 7 = 10 (not prime) 13 + 17 = 30 (not prime) If you multiply two prime numbers, the sum of the digits of the product might or might not be prime. Examples: 2 x 7 = 14, sum of digits is 5 (prime) 2 x 11 = 22, sum of digits is 4 (not prime) 3 x 5 = 15, sum of digits is 6 (not prime) 3 x 7 = 21, sum of digits is 3 (prime) 5 x 7 = 35, sum of digits is 8 (prime)
624
624
624
the product
the two numbers are 14 and - 4.
The numbers are -2 and 28
-6 and -9
It's unclear whether you want two numbers that add to a sum or multiply to a product. 25 x 4 = 100 25 + 75 = 100
Just multiply the two numbers to get the area. This comes out to 576 square feet.
to sum two numbers you add them together then to get twice that you multiply the sum by 2 e.g. if the two numbers are 5 and 8 the sum = 5 + 8 = 13 twice that is 13 x 2 = 26
-4 and +12
Either way, you'll end up with a rational number, but you won't get a sum if you multiply.