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A prime number is when a number can be divided by 1 and itself; has only two factors. 1 is not a prime numberbecause it can only be divided by one. Not only that, but it also has to break down a composite number. When you divide a number by 1, it does not break down. It only stays the same.
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Why isnt 39 a prime number?
39 is not a prime number because it has four factors: 1,3,13,39 and because prime number are numbers who has 2 factors.
How many prime numbers can be made with the digits 1 to 9 without repeating a digit?
first A prime number (or a prime) is a natural number greater than 1 that has no positive divisors other than 1 and itself so 1 isnt a prime primes are 2 3 5 7 11 13 17 etc now by repeating digits if you mean the 1's in 11 then stop at 7 if you mean repeating a digit as in the tens spot of 11 and 13 stop at 11 and 3 and 13 are repating the 3 location....etc
What is the smallest number that looks prime but really isnt?
It isn't clear what you mean with "looks like prime". What would your criteria be to "look like a prime"? The first prime numbers are:2, 3, 5, 7, 11, 13, 17, 23, 29, 31 ...Other positive integers (larger than 1) are composite numbers. The number 1 has a special role, as the identity element of multiplication. It is neither a prime number nor a composite number.
Why is 1 prime?
1 is not a prime so there can be no reason.
Can 1 be a prime factor of a number?
No - as 1 is not a prime number.
A number that isnt a prime number?
Composite
How many prime numbers are between 1 and 20?
nine (though sometimes 2 isnt counted 1,2,3,5,7,11,13,17,19
Is there an equation to find prime numbers?
a prime number is a number that can only be divided by 1and its self... 1 isnt a prime number but 2, 3, 5, 7, 9, 11 etc... are prime numbers.
What is a number called when it isnt a prime number?
Composite
What is but isn't because when it is its not?
optimus prime Nothing isnt what it is because is what its not.
What are the prime numbers in 23 32 9 1851 37 and 79?
23, 37, 79 and 51 (assuming 1851 is a typo, 18 isnt a prime) if not a typo 1851 isnt a prime number anyway, it divides by 3
Can five over nineteen be reduced?
no, 5 isnt divisable by 19. 19 is a prime number and isnt divisable by anything.
Is the number of feet in 4 and one third yards prime or composite?
prime because 4.5 yards equals 13 feet and 13 is prime because theres no number you can multiply to get 13 that isnt 1 and itself
Why isnt 39 a prime number?
39 is not a prime number because it has four factors: 1,3,13,39 and because prime number are numbers who has 2 factors.
Is 91 divisable?
yes 91 is divisable by 7 and 13 so no it isnt a prime #
Were is does the painter in animal crossing lets go to the city?
THERE ISNT 1 atleast I haven't seen 1 SO THERE ISNT 1
Why isnt 1 prime or composite?
1 is neither prime nor composite because Eratosthenes decided that it was nor prime nor composite because 1x1 is 1, but then again,1x any other number is that number, so one can go into every number before and after infinity. Confusing right? Try looking up on Wiki the guy Eratosthenes.
