Here we will explain how to solve problems on Percentage increase and decrease using the concept of Multiplication factor. The concept of Multiplication factor can be used for simplifying problems on Profit, Loss, Data Interpretation etc.
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A bag has certain number of pens. If you take out 3 pens at a time, 2 pens are left, if you take 4 pens, 1 pen is left and if you take 5 pens at a time, 3 pens are left in the bag. What is the smallest number of pens in the bag? […]