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Q: What three prime numbers when multiplied come to 165?

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A prime number is prime because It can only be multiplied by 1 and itself which makes it prime. A number is composite because it can be multiplied by more than two factors. factors: Two numbers you multiply together to come up with a number/answer.

Prime numbers which come after 37 are 41, 43 & 47.

There are 25 prime numbers before 100.

The earliest surviving records of the explicit study of prime numbers come from the Ancient Greeks.

I'm not sure what you mean by that. Prime numbers don't have prime factorizations because they are already prime.

No, multiplying a set of numbers can only come out as one product. Therefore, two numbers having the same prime factorization is impossible.

This is an impossibility. Any odd number multiplied by any other odd number will come out to be an odd number.

The prime numbers for 50 are just 2 because 10 is isn't prime and 25 isn't prime!Becky C.if you don't't belive than why did you come here the 1st place .!!!

Some prime numbers are 2, 7, 19 (more: 2,3,5,7,11,13,17,19,23,29,31,37,41,43,47...) Prime numbers are considered to be prime when their factors only include 1 and itself. The factors have to be whole numbers. 2 is the only even prime number. 1x2=2. No other combination will work. 7 is another prime number. 1x7=7. You can also find no other combination of whole numbers that will multiply to equal 7. 19 is another prime number. You cannot find another combination other than 1 and 19. These are just some examples. There are more prime numbers in the lower numbers because they are less likely to come across a number that will multiply into it.

To simplify a fraction, find the GCF of the numerator and denominator and divide them both by it. To find the GCF, compare their prime factorizations. That's where the prime numbers come in.

17 19 23

There is only one even prime number, the number 2.

There are none. 9, 10 and 11 come closest giving 990

Prime numbers with hundreds of digits have been found, but there are still more to come that haven't been found yet. It's not possible to add up all the prime numbers, because nobody knows what they all are yet. Since there is no last prime number (this was proved 2000 years ago by Euclid), the sum of all prime numbers is infinite.

When it is multiplied by a negative number. ■

Do it in any order, it will always come out the same.

There are 4: 2, 3, 5 and 7

9 numbers that come between 1 to 25 are prime numbers, i.e. the do not have any factor except than 1 and themselves. These numbers are 2, 3, 5, 7, 11, 13, 17, 19, 23.

It depends on whether there are to be added, multiplied or something else. How about 1+2+157?

70, 112, 168

This is a new one on us, and as we try to understand whether or not the whole ideahas any meaning, our most urgent question is: Exactly how would the first prime numberbe "made of" the other prime numbers ?They certainly couldn't be multiplied, because then the big one would have factors,and it wouldn't be a prime number.They couldn't be divided, because if you divide one prime number by another one,the quotient is never a whole number. So that can't be it either.Could two prime numbers be added to get another one ? Well, all of the prime numbersexcept for '2' are odd numbers, and if you add two odd numbers, you get an even number,which can't be a prime number. And a similar argument probably knocks out subtraction.So we're going to go out on a big limb here, risk looking foolish, and state that as faras we're concerned, there's no way in general that a prime number can be "made of"other prime numbers, and that accordingly, we don't have to worry about coming upwith a name for such a thing.We'll be watching the watch-list for other contributors to come along and shoot downour whole shoddy though carefully-constructed line of reasoning.

1 25 38

They are that number's factors.If its the complete set of the smallest such numbers, they are the prime factors.What's the difference? 4 and 15 are factors of 60: 4 x 15 = 60.But the prime factors of 60 are 2 x 2 x 3 x 5. (Note that these are all prime numbers, which is where the term comes from.)By multiplying the prime factors in different combinations -- such as 2 x (2 x 3) x 5 -- we can come up with all the possible combinations which lead to the original number.Also note that the only prime factor of a prime number is itself. Some teachers will tell you that the factors of a prime number are itself and 1, which is also true: 1 (known as unity) is special in that every number, when divided by it, remains the same. But 1 itself is not considered a prime number.

The reason why prime numbers are important practically is because of cryptography. Prime numbers are an essential part of what is called 'public-key cryptography'. In this technique two (massively massively large) prime numbers are multiplied together to generate a public key. Meanwhile the identity of exactly which two prime numbers are involved is kept secret (this is the private key). In the system you can use the public key to encode data and send it to me. But only I can decode that data because only I know the private key. This only works if prime numbers are involved. Otherwise a third party could come along and just start working out all the divisors of my public key and eventually crack which two (non-prime) numbers are the private key. When prime numbers are used, the third party can still try this method (called a brute force attack) but would have to try loads more numbers (because my public key only has two divisors - the two prime numbers - which by definition have no divisors of their own). This means that it would take a long time and wouldn't really be worth it. This technique forms the basis of most encryption over the internet (such as https). A website can send out its public key. The web page can then encode data and send it back to the website but it still can't be deciphered without the private key (even if the public key itself was intercepted).

There are three numbers that come immediately to mind, 1, 2, 4.