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All numbers that only have one and itself as factors are prime. So to tell if a number is prime simply find it's factors. If it has more than two factors than it is not a Prime number.
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What does the number -31 belong to?
It is a prime number
Is 02 a prime number?
0.2 is not a prime number. Prime numbers belong to the set of whole numbers.
What number does not belong 96 89 100 95 86 99?
One reason the number 89 does not belong is because it is a prime number and the other numbers are not.
Is the union of the set of prime numbers and the set of composite numbers equal to the set of counting numbers?
No. One, a counting number, doesn't belong to either of those sets.
Which number does not belong in this group 347129246358 and 729?
Tough to tell when you lump them together like that. If those are three-digit numbers, 347 is the only one that's prime.
Could a non-prime number be multiplied with a non-prime number result in a prime number?
No. Those two non-prime numbers will be factors, so it could not be prime.
What number groups does 19 belong to?
Prime and odd are the only ones I could think of
find the prime number between two number?
There need not be any prime number between them.
Which number in this group does not belong and why 15 13 16 2 8?
One possible answer13 is the only prime number in this group Incorrect 2 is a prime number also* * * * *How about 15 as the only number having different prime factors? I admit that is tenuous, but I cannot do better.
What is the example of a prime number?
prime numbers are those numbers which have only two factors,1 and the number itself.. examples:2,3,5,7 etc...
What number does not belong 23 2 7 13 16?
16 because all the rest are prime numbers. But there are other criteria for oddity: eg 2 is the only even prime. 7 is the only Mersenne prime 13 is the only Wison prime 23 is the only number that is the sum of two other numbers in the set. So, any one of the 5 numbers does not belong - depending on the criterion.
Which number does not belong 20 - 14 - 6 - 19?
Whichever one you want: 20: It is the only number with a repeated prime factor. 14: It is the only number with two non-adjacent prime factors. 6: It is the only number with two adjacent prime factors. 19: It is the only prime number. So now you need to second-guess the person who asked the question!
