For 47 to be written as the sum of two integers, one must be odd and the other must be even. There is only one even prime, namely 2, so one of the numbers must be 2, making the other 45. However, 45 is not prime, so there are no ways to write 47 as the sum of two primes →A.
Source: NuminaMath-1.5,
licensed Apache-2.0.
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