if a is a prime number less than hundred such that b is equal to a + 2 ,in how many cases are both A and B primes?
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5 and 3
5=2+3
B is 5
A is 3
5 and 7
11 and 13
17 and 19
5=2+3
B is 5
A is 3
5 and 7
11 and 13
17 and 19
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