Which number has a factor of 3?

fifty-two

seventy-six

one hundred twenty-five

one hundred thirty-five

Question

Which number has a factor of 3?

 fifty-two

 seventy-six

 one hundred twenty-five

 one hundred thirty-five

anonymous · Answer

i know i will have to cross out the fist 2 but im confused with the last 2

thomaster · Answer

divide them by 3, and check if a whole number comes out of not

anonymous · Answer

ok so 125 divided by 3 is 41.66666

anonymous · Answer

so t5hats not right

thomaster · Answer

nope

anonymous · Answer

135 divided by 3 is 45

anonymous · Answer

so thats right thanks alot thomaster

thomaster · Answer

great job, and you're welcome :)

anonymous · Answer

thomaster can u help me with another 1

thomaster · Answer

I could try :)

anonymous · Answer

Which is the prime factorization of twenty-eight?

 two times fourteen

 two times two times seven

 four times seven

 one times twenty-eight

anonymous · Answer

i belived it was the 1st answwer beacasue it was two even numbers

thomaster · Answer

Well find out which prime numbers multiply together to make the original number (28)
First of all, check if the options are prime numbers.

anonymous · Answer

what were prime numbers again srry

thomaster · Answer

A Prime Number can be divided evenly only by 1 or itself.

anonymous · Answer

but they all equal 2 28

thomaster · Answer

yes but only 1 of the options contains only prime numbers.
Let's start at the first one.
Is 2 a prime number?
And what about 14

anonymous · Answer

wait wait i foun d it in my head i remmebered how to do this the correct answer will be 2x2x7

thomaster · Answer

Yes, both 2 and 7 are prime numbers because you can only divide them by 1 and itself to get a whole number. So that's the correct answer.

anonymous · Answer

yes thx so very much

anonymous · Answer

but 1  more quick question

anonymous · Answer

whats a composite number

thomaster · Answer

oke quick. Normally you shouldn't post the next question in your old question.

anonymous · Answer

ok

thomaster · Answer

A composite number is the opposite of a prime number.
7 is a prime number because you can only divide it by 7 and 1.
8 is a composite number because you can divide it by 1,2,4 and 8 to get a whole number.

thomaster · Answer

So when a number is not a prime number, it's a composite number
Only exceptions are 0 and 1, which are neither composite or prime numbers