is 80 and 189 prime?

Question

sorry i keep asking but i am not very good at math but could someone break it down to me plz thanks

Answer 1

well
they are not prime by themselves,
but they might be
relatively prime to each other

80=2 x2 x2 x2 x5
189= 3x 3x3x7
so, they do not have any divisor in common, that means that
they are relatively prime to each other

Answer 2

80/2= 40 Because 80 Disided by 2 = 40

40 / 2 20 Because 40 divided by 2 = 20

20/ 2 = 10 because 20 divided by 2 = 10

10/2 = 5 because 10 divided by 2 = 5

5/5 = 1 because 5 divided by 5 = 1

The factors are

2 x 2 x 2 x 2 x 5

2 x 2 x 2 x 2 x 5 = 80

80 is not a prime number

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189/3 = 63 because 189 divided by 3 = 63

63/3 = 21 because 63 divided by 3 = 21

21/3 = 7 because 21 divided by 3 = 7

7/7 = 1 because 7 divided by 7 = 1

The factors for 189 are

3 x 3 x 3 x 7

3 x 3 x 3 x 7 = 189

189 is not a prime number

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Click on the URL below for additional information on prime numbers

www.factmonster.com/ipka/A0876084.html

Answer 3

Prime numbers are numbers that can only be made by two factors (positive, whole numbers), being 1 and itself.

For example:
7 is prime, as the only combination of factors between 1 and 7 that equals 7, is 1 and 7.
90 is not prime as it can be divided by 2, 5, 10, and many other whole numbers on the way from 1 to 90.

If you're not sure if something is prime...
Try dividing it by 2, 3, 5, or 7. If you get a whole number for the quotient (no remainder/decimal), it is not prime.

"A tricky one" - One (1) is not prime as it is its own factor. You have to take 2 whole numbers to make a prime and they cannot be the same.

80 no
189 no
269 yes

Answer 4

no a prime number is a number that has only one set of divisors, or numbers it can be divided by, 1 and itself are the only divisors of a prime number 80 is divisable by 2,4,5,8,10 and several others and 189 is divisable by 3,9 and several others

Answer 5

Uh, careful... by the way you are asking numbers in pairs, is your homework to determine if you have numbers that are MUTUALLY prime? In other words, two numbers that do not have a common factor? That is a different question.

Answer 6

No.
189 is divisible by 3
80 is divisible by 5,10,and4, and some other numbers?

Answer 7

obviously you're no good at Math because it is obvious both numbers are not prime

Answer 8

no.

This website will help you out a lot.

www.math.utah.edu/~alfeld/math/p10000.html

Answer 9

no