No.
Divide 7 into 291. If it comes out evenly, it's a factor. It doesn't, so it's not.
There isn't an easy test for 7. You have to divide it. 7 is not a factor of 291.
Divide it. It isn't.
Divide 291 by 7 and see if you get a whole number or is there a remainder. If it is not a whole number, then it is not a factor. 7 goes into 291 41 times with a remainder of 4, so it is not a factor.
Divide 7 into 291. If the result is an integer, 7 is a factor.
I would divide it. It doesn't come out even. It's not a factor.
No. If you divide 291 by 12 you will see that it does not go in 291 an exact number of times.
no because if you divide you get 41.57 and that is not a whole number.
Add up the digits of 291. If they total a multiple of 9, 9 is a factor.
You know that 7 isn't a factor of 291 because the quotient of 291 and 7 isn't a whole number.
7 doesn't have an easy test. But when I see that 291 is made up of 280 + 11, I know that 7 is not a factor.
None. 291 is not divisible by 7 and so you cant have a whole number factor pair with 7