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3 + 17 = 20

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โˆ™ 2010-09-02 09:07:37
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Q: Express 20 as a sum of 2 prime numbers?
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They are: 2+7+11 = 20


What are Two prime numbers whose sum is 20?

3 and 17


What is the sum of the odd prime numbers from 1-20?

It is 75.


What is the sum of twin prime numbers from 20 to 50?

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What is the product of two prime numbers whose sum is twenty?

17 and 3 are two prime numbers whose sum is 20. Their product is 51.


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(2,3) and (2,5) are the two pairs such that the sum of their elements is a prime number.


What are 2 even prime numbers for the sum of 20?

There is only one even prime number: 2. So, representing 20 as a sum of even prime numbers would be 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2 + 2.


What is the sum of the largest prime less than 20 and more than 60?

The largest prime less than 20 is 19. The largest prime over 60 is 61. The sum of these two numbers is 80.


What prime number less than 20 can be written as the sum of four different prime numbers?

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The prime numbers between 4 and 20 are 5, 7, 11, 13, 17 and 19. Their sum is 72.


What are the HCF of 15 and 20?

To find the HCF, you first have to express both numbers as the product of their prime factors: 15 = 3x5 20 = 2x2x5 The next step is to identify any common prime factors. In this case both numbers have a 5 as a prime factor. Therefore the HCF of 15 and 20 is 5.


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2 + 3 = 5


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