For the following questions answer them individually
A man purchased a watch for Rs. 400 and sold it ata gain of 20% of the selling price. The selling price of the watchis:
A shopkeeper mixes two varieties of tea, one costing Rs. 35 per k.g. and ‘anotherat Rs. 45 per kg. in the ration 3:2. If he sells the mixed variety at Rs. 41.60 per k.g., percentage of his gain or loss is:
Two-fifth of one-fourth of three-seventh of a numberis 15. Whatis half of that number ? .
The compound interest on a certain sum for 2 years is Rs. 41 and the simple interest is Rs. 40. What is the rate percent?
A sum of money at compound interest amounts to thrice itself in 3 years. In how many years will it be 9 times itself?
The difference between simple interest and the compound interest on Rs.600 for one year at 10% per annum, reckonedhalf yearly is’