Read the following information carefully and answer the question.

A, B, C, D and E are five cars while P, Q and R are three motorcycles. A is the fastest among of the cars and R is the slowest among of the motorcycle, C is costlier than D and Q but cheaper than B. Among cars, A is not the costliest. D is cheaper than E and there is no car whose cost lies between the cost of these two. E is faster than three of the cars and all the motorcycles. Q is costlier than R but cheaper than P, which is faster than Q.

Which of the following cars cannot stand exactly in the middle position among cars as far as their cost is concerned?

Rohit is ranked ${18}^{\mathrm{th}}$, from the top in his class. When counted from the bottom, he is ranked ${36}^{\mathrm{th}}.$ What is the total number of students in the class$?$

Ravi is $7$ ranks ahead of Sumit in a class of $39$. If Sumit's rank is seventeenth from the last, what is Ravi's rank from the start?

A pole is taller than a Giraffe which is taller than a Tree. A signal is shorter than a pole, but taller than a building which is taller than a Giraffe. Who is the shortest ? 

1. Signal
2. Giraffe
3. Tree
4. Building

Five balls $\mathrm{L}1, \mathrm{L}2, \mathrm{L}3, \mathrm{L}4 \mathrm{and} \mathrm{L}5$, are kept one above the other (not necessarily in the same order). $\mathrm{L}1$, is just above $\mathrm{L}5$, and just below $\mathrm{L}4$. $\mathrm{L}2$, is just above $\mathrm{L}3$, and just below $\mathrm{L}5$ . How many balls are above $\mathrm{L}2$?

There are $50$ buildings in a row. The green building is $14\mathrm{th}$from the right end. What is its position from the left end?

Among five friends - O, P, Q, R, and S, each scored different marks in an examination. P scored more than R and Q, but less than O. O did not score the highest marks and did not score the lowest marks. Who amongst the following scored the third highest?