Direction: 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?

18 percent of the coal was destroyed in a coal mine. If only 492 tons of coal was received, then tell how much coal was destroyed?

The largest 4 - digit number exactly divisible by each of 12, 15, 18 and 27 is : 

The H.C.F. of two numbers is 8. Which one of the following can never be their L.C.M? 

If $$ {t^{2}-4t+1=0}$$ then what is the value of $${t^{3}+{1\over {t^{3}}}}$$ ?

How many times the keys of a typewriter have to be pressed in order to write number from 121 to 1346?

The value of which one of the following fractions falls in between $$ {3\over 5}$$ and $$ {7\over 8}$$?