Study the following graph carefully and answer the questions that follow:
The graph given below represents the number of users of two broadband services A and B across 5 cities P, Q , R, S and T.

What is the difference between the total number of users of brand A and B together in city R and the total number of users of brand A and B together in city P?
What is the respective ratio of the number of users of brand A in city P to the number of users of brand B in city S?
For the following questions answer them individually
21 articles were bought for 6531 and sold for Rs.9954. How much was the approximate profit percentage per article?
A and B together can complete a particular task in 8 days. If B alone can complete the same task in 10 days, how many days will A take to complete the task if he works alone?
The cost price of an article is Rs.1700. If it was sold at a price of Rs.2006, what was the percentage profit on the transaction?
What should come in place of the question mark (?) in the following number series?
1, 1, 2, 6, ?, 120
7, 8, 16, 43, ?, 232
4, 13, 17, ?, 30, 39
982, 977, 952, 827, 822, ?
41472, 5184, 576, 72, 8, ?