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Find the number of positive integers n1000 such that 15n is a perfect square.

 Sep 17, 2019

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 #1
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15=35 so 15n being a perfect square means n=15k2We want all of these up to 100015k21000k26623k8So we have n=15,60,135,240,375,540,735,960

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 Sep 17, 2019
 #1
avatar+6251 
+1
Best Answer

15=35 so 15n being a perfect square means n=15k2We want all of these up to 100015k21000k26623k8So we have n=15,60,135,240,375,540,735,960

Rom Sep 17, 2019

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