Question : The sum of squares of 3 consecutive positive numbers is 365. The sum of the numbers is:
Option 1: 30
Option 2: 33
Option 3: 36
Option 4: 45
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Correct Answer: 33
Solution : Let the numbers be $n–1, n$ and $n+1$. $(n–1)^{2} + (n)^{2} + (n+1)^{2} = 365$ or, $n^2 – 2n+1+n^2+n^2+2n+1 = 365$ or, $3n^2 = 365–2$ or, $3n^2 = 363$ or, $n^2 = 121$ or, $n = 11$ So, 10, 11 and 12 are the numbers. Their sum is (10 + 11 + 12) = 33 Hence, the correct answer is 33.
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Question : The sum of the squares of 3 consecutive positive numbers is 365. The sum of the numbers is:
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