2, 3, 5, 7, 9
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Numbers cannot "make" another number prime. If you are looking for the prime factorization of 56, it is 23 * 7.
the two prime numbers will be factors of that number, which would make that number a composite number
Yes, it can. Examples are 2 and 5 to make 10 and 2 and 7 to make 14. If your question was if they could make an even prime number, the answer is no. Two is the only even prime number.
it is impossible
There are four prime numbers under ten and two red suits. That would make eight. Each playing card has its number printed twice in opposite corners. That would make sixteen. I don't know if you want to count that or not.