1. In a row of boys, If A who is 10th from the left and B who is 9th from the right
interchange their positions, A becomes 15th from the left. How many boys are
there in the row ?

2. Salman ranked 9th from the top and 38th from the bottom in a class. How
many students are there in the class ?

3. Three persons A, B and C are standing in a queue. There are five persons
between A and B and eight persons between B and C. If there be three persons
ahead of C and 21 persons behind A, what could be the minimum number of
persons in the queue?

4. Sharjeel ranks 18th in a class of 49 students. What is rank from the last ?

5. In a queue, Amna is 10th from the front while Madiha is 25th from behind
and Madiha is just in the middle of the two. If there be 50 persons in the queue.
What position does Madiha occupy from the front ?

6. How many 4's are there preceded by 7 but not followed by 3?
5 9 3 2 1 7 4 2 6 9 7 4 6 1 3 2 8 7 4 1 3 8 3 2 5 6 7 4 3 9 5 8 2 0 1
8 7 4 6 3

7. In a row, Kanwal is at 7th place from the left and Khadija is at 9th place
from the right. When they interchange the positions Kanwal becomes 11th
from left. How many were seated in the row ?

8. P, Q, R, S, T, U, V and W are sitting round the circle and are facing the centre:
P is second to the right of T who is the neighbour of R and V.
S is not the neighbour of P.

V is the neighbour of U.
Q is not between S and W. W is not between U and S.
Then Who is sitting opposite to U ?

9. How many such digits are there in the number 7346285 which are as far away
from the beginning of the number, as they will be when arranged in ascending
order within the number?

10. How many such pairs of digits are there in the number 421579368 each of
which has as many digits between them in the number as when they are
arranged in ascending order?