Interview Q&A / Aptitude

1. A sells a bicycle to B at a 20% profit, and B sells it to C at a 25% profit. If C pays ₹1,500, what did A pay for it?

   ₹1,000. Each sale multiplies the price: CP of A x 1.2 x 1.25 = 1,500, so A's cost = 1,500 / 1.5 = ₹1,000.

   IntermediateQuick answer1 min read
2. Two phones are each sold for ₹1,200, one at a 20% profit and the other at a 20% loss. What is the overall profit or loss?

   An overall loss of 4%, or ₹100. Costs are 1,200/1.2 = ₹1,000 and 1,200/0.8 = ₹1,500. Total cost ₹2,500, total sale ₹2,400. When selling prices are equal and the gain and loss percentages are equal, there is always a loss of x^2/100 %.

   IntermediateQuick answer1 min read