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Arithmetic & Number Properties question bank (Numerical Ability & Quantitative Aptitude)

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Q1.
[Quantitative Aptitude - Technical Interview #2] A pipe can fill a reservoir in 12 hours, while a leak at the bottom can empty it in 20 hours. If both operate simultaneously, in how many hours will the reservoir be completely filled?

(A)
30 hours
(B)
24 hours
(C)
32 hours
(D)
16 hours
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Q2.
[Logical Reasoning - Technical Interview #4] Statements: All engineers are problem solvers. Some problem solvers are data architects. Conclusion: Which inference logically follows?

(A)
Some problem solvers are engineers
(B)
No data architect is a problem solver
(C)
All engineers are data architects
(D)
All problem solvers are engineers
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