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They are: 3+5+11 = 19

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Q: What prime number under 20 can be expressed as the sum of three different prime numbers?
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Related questions

What is a composite number expressed as a product of prime numbers?

A prime factorization


What is a number that can be factored as a prime number be called?

All composite numbers can be expressed as unique products of prime numbers. This is known as a prime factorization.


What is A composite number expressed as a product of factors that are prime numbers?

a prime factorization


Can every prime number be expressed as the product of two prime numbers?

None of them can.


Can every prime number be expressed as the product of 2 prime numbers?

No, none can.


Does every number have a prime fractorization?

All composite numbers can be expressed as unique products of prime numbers.


How do you get 44 using prime numbers?

Every counting number(except 1) can be expressed as product of prime numbers. So 44 can be expressed as product of prime numbers: 44 = 2x2x11 = 22x11.


What is a whole number expressed as a product of factors that are all prime numbers?

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A composite number expressed as the product of factors that are prime numbers?

That's a prime factorization.


What is the relationship between prime numbers and rational numbers?

All prime numbers are rational number because they can be expressed as 'top heavy' fractions as for example the prime number 3 as a fraction is 3/1


What is a prime fractorization?

An expression that shows a number expressed as a product of prime numbers.


Is every prime number a rational number?

Yes. Rational numbers are numbers that can be written as a fraction. Irrational numbers cannot be expressed as a fraction.