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Are odd numbers cannot be written as sum of prime numbers?
Some odd numbers can be written as the sum of prime numbers. 2 + 3 = 5
What do you notice about the numbers that cannot be written as a product of prime factors?
the numbers are odd
What different between odd number and prime number?
While all prime numbers are odd (except 2), not all odd numbers are prime. 9 for example is an odd number, but you can get it by multiplying 3X3, so it is not prime. Odd numbers are numbers that are not divisible by 2. Prime numbers are numbers that cannot be generated by multiplying 2 whole numbers besides 1 and itself.
Can the number 23 can be written a sum of two prime numbers?
No, it cannot be done. As 23 is odd, two numbers used would have to be one odd and one even. As 2 is the only even prime number and 21 + 2 equals 23, but 21 is not a prime number, it cannot be done.
How many of the prime numbers between 10 and 20 can be written as the sum of two primes?
All prime numbers greater than 2 are odd numbers. For an odd prime to be written as the sum of two primes, one of the primes must be 2 because two odd primes will produce an even sum. 11 cannot be written as the sum of two primes. 13 = 2 + 11. 17 cannot be written as the sum of two primes. 19 = 2 + 17.
Are prime numbers are odd numbers?
With exception of the number 2, all prime numbers are odd. However, not all odd numbers are prime.
Are all prime numbers odd numbers?
All prime numbers are odd with the only exception of the prime number 2. However, not all odd numbers are prime.
Why odd numbers have lots of prime numbers?
The only even prime is 2. The rest are all multiples of 2, and thus cannot be prime.
Are there more odd numbers or prime?
odd numbers
Why are not all odd numbers greater than 3 are prime numbers?
Because many of them are divisible by smaller odd numbers. For example 35 is divisible by 5 and so 35 cannot be a prime number.
Are more number prime or odd?
There are more odd numbers than prime numbers.
Are there more even prime numbers or odd prime numbers?
All prime numbers are odd, exept of the first prime number 2.
