For the following questions answer them individually
The liSt price of an article is 160 and a customer buys it for 122.40 after two successive discounts. If the first discount is 10%, then second discount is
In a school, 10% of number of girls is equal to 1/20 th of number of boys. Ratio between the number of boys to number of girls is
The average of 20 numbers is 15 and the average of first five is 12. The average of the rest is
A tradesman sold an article at a loss of 20%. If the selling price had been increased by 100, there would have been a gain of 5%. The cost price of the article (in Z.) was
The price of an article is first decreased by 20% and then increased by 30%. If the resulting price is 416, the original price of the article is
A man performs 2/15 of the total journey by train, 2/20 of remaining by bus and the remaining 10 km on foot. His total journey in km is
By walking at 3/4 of his usual speed, a man reaches his office 20 minutes later than usual. His usual time is
If the compound interest on a certain sum for two years at 12% per annum is 2,544, the simple interest on it at the same rate for 2 years will be