For a 2-digit Prime number (which are all odd) to be the sum of two prime numbers, one of the prime numbers will have to be 2. That means the difference between the sum and the other addend will have to be 2. Prime numbers that differ by 2 are called twin primes. There are six pairs of 2-digit twin primes. Your numbers are 13, 19, 31, 43, 61 and 73.
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No two digit prime number exists that is a multiple of 7. All two digit numbers that are multiples of 7 are compositenumbers.
There are 21 two-digit prime numbers.
Two-digit prime numbers whose digits add up to 10 are:193773
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269
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No two digit prime number exists that is a multiple of 7. All two digit numbers that are multiples of 7 are compositenumbers.
what is the least possible sum of two 4-digit numbers?what is the least possible sum of two 4-digit numbers?
There are 21 two-digit prime numbers.
For the tens digit to be a prime number then it must equal 2, 3, 5 or 7. There are four 3-digit prime numbers that fit the above condition and also have the tens and units digits forming a 2-digit prime number. 131, 137, 173, 179. The person supplying the question may like to sum the various combinations.
348 = 79 + 83 + 89 + 97
Two-digit prime numbers whose digits add up to 10 are:193773
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.
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It is impossible for the product of two prime numbers to be prime. It is impossible for the sum of two prime numbers to be prime as long as one of the numbers isn't 2.
If you meant "what two prime numbers have a sum of 36?" the answer is 19 and 17.