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Q. Rambabu sells paper planes at the rate of 20 planes for Re. 1. If he gets profit of 20%, how many planes did he buy in 1 rupee?

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Q. What will be the fraction of 4%

Q. Ratio of two numbers is 3:8. On adding 5 to both numbers, the ratio becomes 2:5. Which is the smaller number out of the two?

Q. The smallest quantity is chosen at the corners of the closed path with negative sign to be assigned at unused cell because