This question seems simple, but I can’t understand where my logic is going awry…Please explain the flaw in my reasoning
9 is a factor of 2x. Which of the following may not be an integer?
1) (6x/54) + (2x/3)
2) (4x- 18 )/9
3) (2x+27)/9
4) (81-4x^2)/81
5) (2x-3)/3
My reasoning is that since 2x is a multiple of 9 (and 2 and 9 do not have any common factor) x has to be a multiple of 9 say 9,18,27,36….
But the answer is A….even though it should be an integer as per my logic…I know I am missing something….please explain the flaw!
9 is a factor of 2x. Which of the following may not be an integer?
1) (6x/54) + (2x/3)
2) (4x- 18 )/9
3) (2x+27)/9
4) (81-4x^2)/81
5) (2x-3)/3
My reasoning is that since 2x is a multiple of 9 (and 2 and 9 do not have any common factor) x has to be a multiple of 9 say 9,18,27,36….
But the answer is A….even though it should be an integer as per my logic…I know I am missing something….please explain the flaw!
