Question

1. Write four pairs of twin prime numbers.
2. Write four pairs of co-prime numbers.​

Answer 1

1. The first few twin prime pairs are: (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), (71, 73), (101, 103), (107, 109), (137, 139), … OEIS: A077800. Five is the only prime that belongs to two pairs
2. Two numbers are said to be coprime if their HCF is 1. Examples-(2,3),(3,4),(5,6),(5,7),(5,9),(9,11) etc.

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Answer 2

Answer:

The first few twin prime pairs are: (3, 5), (5, 7), (11, 13), (17, 19), (29, 31), (41, 43), (59, 61), (71, 73), (101, 103), (107, 109), (137, 139),

Both the pairs—2,3.3,4.5,6. and