Danny attended a test containing 40 questions. If he had corrected 18 questions out of the first 22 and two-third of the remaining questions, what percent of all the questions did he answer correctly?

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Which of the following equals '4x+2xy+(2x+xy)y'?

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If a=-2, b=3, c=1 and d=4, then what is the Value of (a3)-2b2)d(c3/2)?

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An empty pool is being filled with water at a constant rate. It takes 9 hours to fill 3/5 th of the pool. How much more time will it take to completely fill the pool?

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In a certain exam, 65% students passed in Math and 50% passed in English. If 25% of the students have passed in both the subjects, what percent of the students have failed in both Math and English?

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