For the following questions answer them individually
A shopkeeper gains 17% after allowing a discount of 10% on the marked price of an article. Find his profit percent if the articles are sold at marked price allowing no discount.
A man spends 75% of his income. His income is increased by 20% and he increased his expenditure by 10%. His savings are increased by
Cost price of 100 books is equal to the selling price of 60 books. The gain percentage/loss percentage is
The ratio of each interior angle to each exterior angle of a regular polygon is 3 : 1. The number of sides of the polygon is
A sum of money lent out at simple interest amounts to Rs. 720 after 2 years and Rs. 1020 after a further period of 5 years. Find the principal.
Find the square root of $$\frac{(0.064-0.008)(0.16-0.04)}{(0.16+0.08+0.04)(0.4+0.2)^3}$$
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