There 50 people in a row. Rajiv is 28th person from the right side of the row. Raushan is  32nd person from the left side of the row. What is the total number of people sitting between Rajiv and Raushan?

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?