Question

classify the number as prime, composite oe neither
51


Also simplify 80/60

Answer 1

Did you apply the divisibility tests to the number 51?

Answer 2

no what is that

Answer 3

Well, if it is even, it can be divided by 2. Is it an even number?

Answer 4

it would be an odd number

Answer 5

So it fails the divisible by 2 test.
Add the digits. What do you get?

Answer 6

Hello. Are you there?

Answer 7

add which digits

Answer 8

sorry I am new to algebra

Answer 9

The digits of the number 51

Answer 10

5+1=???

Answer 11

you get 6

Answer 12

51 must be prime i suppose

Answer 13

So if the sum of the digits is divisible by 3, then the number is divisible by 3. If it is divisible by an integer, then it is NOT prime and is composite.

Answer 14

so I would classify 51 as neither prime or composite

Answer 15

51= 17 x 3 so it is composite

Answer 16

80/60 is 8/6 which is 4/3 or 1 1/3

Answer 17

51 is divisible by 3, therefore it is a composite number.
Prime numbers are those that cannot be divided by anything except for 1 and the number itself. Composite numbers have other factors. Neither usually indicates that the number is complex or imaginary (or 0). 80 / 60 = 8 / 6 = 4 / 3 = 1 and 1/3

Answer 18

Thanks to both of you for answers