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Given that $5x=3y=z$ where $x, y, z$ are integers, each choice given below must be integer except?

A) $z/15 \quad\quad $ B) $z/5 \quad\quad$ C) $z/3 \quad\quad\\ $ D) $z/xy \quad\quad\\$ E) $x/3$

(Ans=D)

How would I solve this problem any suggestions ?

3 Answers 3