Question

which of the following numbers are twin prime 1) 3,7 2) 13,17 3)3,5 4) 19,21​

Answer 1

Answer:

19,21 are the twin prime

Answer 2

A twin prime is a prime number that is either 2 less or 2 more than another prime number—for example, either member of the twin prime pair. In other words, a twin prime is a prime that has a prime gap of two

Examples are (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), (71, 73)

So the ans is 3) 3,5