For the following questions answer them individually
Simple interest on a sum for 10 years is equal to 5% of the principal. In how many years interest will be equal to the principal?
The ratio of selling price to the cost price is 21 : 16. What is the profit percentage?
Dinesh purchases 10 dozens of apples at the rate of Rs 180 per dozen. He sold each one of them at the rate of Rs 19.5. What is the profit (in percentage) of Dinesh?
If $$x = 4 + \sqrt{15}$$, then what is the value of $$[x^2 + (\frac{1}{x^2})]$$ ?
Some masons promised to do a work in 10 days but 8 of them were absent and remaining did the work in 18 days. What was the original number of masons?
A boat goes 8 km upstream and 12 km downstream in 7hours. It goes 9 km upstream and 18 km downstream in 9 hours. What is the speed (in km/h) of the boat in still water?
The pie chart shows the results of an online survey which asked people about their favourite movie. Study the diagram and answer the following questions.
Which movie is the favourite of most people surveyed?
What is the total numbers of people who have responded to the survey?
The measure of the central angle of the sector representing number of people whose favourite movie is C is ________ degrees.
Respondents who say their favourite movie is D and those who say their favourite movie is B constitute what percent of the total respondents?