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write all pairs of twin primes between 40 and 70
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Answers
Given that,
Two numbers 40 and 80.
To find,
All pair of twin prime numbers
Solution,
Two prime numbers are called twin primes if there is present only one composite number between them.
40 and 80 both are even numbers.
The first twin prime number between 40 and 80 is (41,43)
Others are : (59, 61), (71,73)
Hence, there are three pairs of twin prime number between 40 and 80 i.e. (41,43), (59, 61) and (71,73).
there are 2 pairs of prime nos between 40 and 70
--> (41,43) & (59,61)
NOTE:-- A prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. A natural number greater than 1 that is not prime is called a composite number. For example, 5 is prime because the only ways of writing it as a product, 1 × 5 or 5 × 1, involve 5 itself.
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