# root info solutions Interview Questions

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###### Write {x: x ∈ R, 3 ≤ x ≤ 4} as an interval.
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###### In what time a sum of money double itself at 3% per annum simple interest? A. 33 1/3 years B. 29 years C. 23 1/3 years D. 13 1/3 years
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###### A clock is set right at 5 a.m. The clock loses 16 minutes in 24 hours. What will be the true time when the clock indicates 10 p.m. on 4th day? A. 5 p.m B. 7 p.m C. 9 p.m D. 11 p.m
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###### If x + y = k, x > 0, y > 0, then xy is maximum when A. x = y B. kx = y C. x = ky D. None of these
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###### Which of the following does not have a proper subset A. {x: x ? Q} B. {x: x ? Q, 3 < x < 4 C. {x: x ? N, 3 < x < 4} D. None of these
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###### For Cosine Rule of any triangle ABC, a² is equal to A. b³ + c³ - 2bc cos B B. b² - c² + 3bc cos C C. b² + c² - 2bc cos A D. b² + a² - 2ac cos A
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