Sum of two cousins
Difficulty level:
The number 10 can be written in two ways as a sum of two prime numbers:
10 = 5 + 5
and
10 = 7 + 3
How many ways can the number 549 be written as a sum of two prime numbers?
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Difficulty level:
The number 10 can be written in two ways as a sum of two prime numbers:
10 = 5 + 5
and
10 = 7 + 3
How many ways can the number 549 be written as a sum of two prime numbers?
