IBPS Government Jobs Exams Numerical Ability Alligation or Mixture

There are two alloys made up of copper and aluminum. In the first alloy copper is half as much as aluminum and in the second alloy, copper is thrice as much as aluminum. How many times the second alloy must be mixed with the first alloy to get the new alloy in which copper is twice as much as aluminum? (1) 2 (2) 3 (3) 4 (4) 5 (5) None of these

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Shyam can row a boat with 14⅔ km/hr in still water and it take 20% more time to cover same distance in upstream than downstream. Find speed of current is what percent of speed of boat in still water? (1) 3.33% (2) 11.11% (3) 14.28% (4) 7.14% (5) 9.09% Mr X mixed 10 kg of variety A rice with 15 kg of variety B rice and sold the mixture at a price 40% more than that of A. He did not get any profit. What is the ratio of the cost price of variety A to that of B per kg? (1) 2 : 5 (2) 3 : 5 (3) 4 : 5 (4) 5 : 8 (5) None of these