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Re: The positive integer q is divisible by 15. If the product of q and the [#permalink]
1
\(q\) is divisible by \(3\) & \(5\), hence the least +ve value of \(q\) can be \(15\)

\(qx\) is divisible by \(20\).
Factors of \(20: 2 * 2 * 5\)

\(5\) is already there with \(q\) so we will need \(4\), which can be the least value of \(x\)

So we can say that \(x^2q\) will have at least \(4\) & \(15\)

Hence, \(60\) must be a factor of \(x^2q\)

Answer B

aishumurali wrote:
Can someone pls explain this sum?
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