# Number, Ranking and Time Sequence Test Questions

Q:

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?

 A) None B) One C) Two D) Three

Explanation:

Given Number:     4  2  1  5  7  9  3  6  8

Ascending order:  1  2  3  4  5  6  7  8  9

Hence the required pairs are  $\inline \underline{49},\underline{12}\; \; and \; \; \underline{16}$

265 21078
Q:

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

 A) Four B) Three C) Six D) Five

Explanation:

7  4  2

7  4  6

7  4  1

7  4  6

Only at these placees 4 is preceded by 7 but not followed by 3

112 15213
Q:

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 ?

 A) 23 B) 31 C) 27 D) 28

Explanation:

Clearly, A’s new position is 15th from the left. But this is the same as B’s earlier position which is 9th from the right.

232 9020
Q:

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

 A) 31 B) 18 C) 32 D) 19

Explanation:

Number students behind the nitin in rank = (49 - 18) = 31

Nitin is 32nd from the last

115 5094
Q:

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

 A) 45 B) 47 C) 46 D) 48