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What else can I help you with?
What is a counter example for the statement that all odd numbers are prime?
9 = 3 x 3 15 = 3 x 5 etc. Any odd number that is composite. But 2 is a prime number which is not an odd number. [Wrong question: that is a counter example to all primes are odd numbers]
What is a pair of twin prime?
A twin prime pair are two primes separated by 2. For example, 3 and 5 are twin primes. It is conjectured that there are an infinite number of twin primes.
What is a twin prime pair?
A twin prime pair are two primes separated by 2. For example, 3 and 5 are twin primes. It is conjectured that there are an infinite number of twin primes.
What is an example of a conjecture?
A famous conjecture is the Twin prime conjecture, which states that there are infinitely many "twin primes" - primes which are 2 apart (for example, 11 and 13, or 17 and 19, are twin primes)
Is the sum of prime numbers cannot be a prime?
Not true. 2 + 3 = 5, where all three are primes. One of the primes in the sum must be 2, otherwise both primes would be odd and their sum would be even (and >2) and therefore not prime. Such primes: p and p+2 [3 and 5 in the above example] are known as twin primes and there are infiitely many twin primes.
Are 11 and 13 twin primes?
The numbers 11 and 13 are prime twins. Prime twins are consecutive prime numbers that differ by a difference of two. For example, 3 and 5, 7 and 9 are twin primes.
Can two primes equal a prime?
sometimes two primes equal a prime and sometimes they don't. for example 2 and 5 are prime and they equal 7 which is also prime. however if you add 5 and 11 which are prime it equals 16 which isn't prime- it's composite:)
Can the sum of three primes be prime?
Yes. For example, 5 + 7 + 11 = 23.
What is it called when the opposite of a prime number is also prime example 37 and 73 or 17 and 71?
They are called palindromic primes
How can a 5 be a composite and a prime number?
It cannot. A number can be one or the other, but never both. The definition of Composite, is that it is "Composed" of primes, in other words that two or more primes were multiplied together to obtain it. 5 is prime.
Can the product of two prime numbers be a prime number?
no if you multiply two primes for example 7x9=63 63 is not prime because 9 and 7 go into it
What are symmetric prime?
Two primes are symmetric primes of a natural number (n) if their average is n. For example 10, has two pairs of symmetric primes. 7 and 13, and 3 and 17 because their averages are 10.
