Hello,
Your question is incorrect or has a mistake. You have stated that P,Q,R,S,T are positive integers. If you multiply them with any number it will be still a integer. The question might be something else. Please check it again.
You can ask to your maths teacher and he/she will let you know where the mistake it. It is basic concept that what ever be the number you multiply with an integer it may be negative or positive , the result will always will be a integer.
Hope it helps!
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