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71 = 7, 72 = 49, 73 = 343, 74 = 2401 31 = 3, 32 = 9, 33 = 27, 34 = 81 i.e. the digit at unit’s place gets repeated after power 4. Unit 6 remains same for any power. Required unit’s digit = Unit’s digit in the product of 73 × 6 × 31 = 4
A man buys cashew nuts at Rs.600 per kg and sells them at Rs.15 per 50 grams. What is his profit/loss percentage?
A shopkeeper sold a fridge for Rs. 1200, making a 20% gain. The fridge was marked at Rs. 1400. What was the discount he provided to make only 10% profit?
