jsphcal wrote:

Is k the square of an integer?

(1) \(k= t ^2 * q^6 * r^10\) , where t, q and r are integers

(2) \(k= r ^2 * m^{15}\) , where r and m are integers

Please correct the typo in statement 1...

1) we have\(k={(tq^3r^5)}^2\). Since t,q and r are intergers, k is the square of an integer. Sufficient.

2)m can take several values for k to not be the square of an integer. If m =1, k is the square of an integer. Insufficient.

Answer is A.

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