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If x and y are odd integers

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by [email protected] » Wed Nov 15, 2017 4:37 pm
Hi lheiannie07,

We're told that X and Y are ODD integers. We're asked which of the following will always be a NON-INTEGER. This question can be solved by TESTing VALUES.

IF... X=3 and Y=3
Answer A: 9
Answer B: 1
Answer C: 1
Answer D: 9/2
Answer E: -9

Final Answer: D

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Answer

by EconomistGMATTutor » Thu Nov 16, 2017 8:27 am
Hello.

The key in this PS question is: "must always" be a non-integer.

a) xy, the product of two odd integers is integer. OUT.

b) x/y, if x=3 and y=1, then x/y is integer. So, it can be sometimes integer and sometimes not. OUT.

c) as above. OUT.

d) The product of to odd integers ALWAYS is an odd integer. So, xy/2 will be ALWAYS non-integer. CORRECT.

e) as option a). OUT.

I hope this answer can help you.

I'm available if you'd like a follow up.

Regards.
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by BTGmoderatorDC » Wed Jan 10, 2018 9:59 pm
EconomistGMATTutor wrote:Hello.

The key in this PS question is: "must always" be a non-integer.

a) xy, the product of two odd integers is integer. OUT.

b) x/y, if x=3 and y=1, then x/y is integer. So, it can be sometimes integer and sometimes not. OUT.

c) as above. OUT.

d) The product of to odd integers ALWAYS is an odd integer. So, xy/2 will be ALWAYS non-integer. CORRECT.

e) as option a). OUT.

I hope this answer can help you.

I'm available if you'd like a follow up.

Regards.
Thanks a lot!
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by BTGmoderatorDC » Wed Jan 10, 2018 10:00 pm
[email protected] wrote:Hi lheiannie07,

We're told that X and Y are ODD integers. We're asked which of the following will always be a NON-INTEGER. This question can be solved by TESTing VALUES.

IF... X=3 and Y=3
Answer A: 9
Answer B: 1
Answer C: 1
Answer D: 9/2
Answer E: -9

Final Answer: D

GMAT assassins aren't born, they're made,
Rich
Thanks a lot!
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