Mathematics
A car washer can wash 8 cars in 18 minutes. At this rate how many cars can be washed in three hours?
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Amir has 16 marbles in his pocket. He has 8 red ones, 4 green ones, and 4 blue ones. What is the minimum number of marbles he must take out of his pocket to ensure that he has one of each color?
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Your supervisor instructs you to purchase 240 pens and 6 staplers for the office. Pens are purchased in sets of 6 for Rs.2 per pack. Staplers are purchased in sets of 2 for Rs.12.95. How much will purchasing these products cost?
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