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Q:

In the number 76534218 each digit is replaced next digit, ie '1' is replaced by '2' , '2' is replaced by '3' and so on and then the digits are arranged in ascending order from left to right, which digit will be fifth from the left end?

A) 6	B) 5
C) 7	D) 4

Answer & Explanation Answer: A) 6

Explanation:

Given Number : 7 6 5 3 4 2 1 8

New Number : 8 7 6 4 5 3 2 9

Ascending Order : 2 3 4 5 6 7 8 9

Fifth digit in the above ascending order arrangement is '6' . Hence option(1) is the correct answer.

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Q:

Which of the following is fifth to the right of the twelth digit from the right end of the below arrangement?

1 8 5 9 4 7 1 2 5 8 3 6 5 9 2 7 6 4 5 2 9 2 6 4 1 2 3 5 1 4 2 8 3

A) 3	B) 1
C) 2	D) 7

Answer & Explanation Answer: A) 3

Explanation:

5th to the right of 12th digit from the right end means (12 - 5 = ) 7th digit from the right.ie 3.

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Q:

How many even numbers are there in the following sequence of numbers which are immediately followed by an odd number as well as immediately preceded by an even number?

8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1

A) 2	B) 3
C) 4	D) 5

Answer & Explanation Answer: C) 4

Explanation:

We have to find out even number - even number - odd number sequence.

8 5 8 6 7 6 8 9 3 2 7 5 3 4 2 2 3 5 5 2 2 8 1 1 9 3 1 7 5 1

There are four such such even numbers: 6,8,2 and 8.

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Q:

What should come next in the following number series?

9 8 7 6 5 4 3 2 1 8 7 6 5 4 3 2 1 7 6 5 4 3 2 1

A) 9	B) 8
C) 7	D) 6

Answer & Explanation Answer: D) 6

Explanation:

Here the series is:

987654321, 87654321, 7654321, 65...

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Q:

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?

A) 41	B) 40
C) 28	D) 27

Answer & Explanation Answer: C) 28

Explanation:

Three persons A, B, C can be arranged in a queue in six different ways, ie ABC, CBA, BAC, CAB, BCA, ACB. But since there are only 3 persons ahead of C, so C should be in front of the queue. Thus, there are only two possible arrangements, ie CBA and CAB.

We may consider the two cases as under:

Case I: $\overset{3}{\leftarrow} C \overset{8}{\leftrightarrow} B \overset{5}{\leftrightarrow} A \overset{21}{\to}$

Clearly, number of persons in the queue = (3+1+8+1+5+1+21=) 40

Case II: $\overset{3}{\leftarrow} C A \overset{5}{\leftrightarrow} B$

Number of persons between A and C

= (8 - 6) = 2

$∵ [C \overset{8}{\leftrightarrow} B A \overset{21}{\to} B]$

Clearly number of persons in the queue = (3+1+2+1+21) = 28

Now, 28 < 40. So, 28 is the minimum number of persons in the queue.

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Q:

There are five books of different thickness. A is thicker than C and B is thicker than D. E is not as thick as B, but is thicker than C. D is not as thick as C. Which is the thinnest book?

A) E	B) D
C) B	D) C

Answer & Explanation Answer: B) D

Explanation:

A > C -----(i), B > D -----(ii), E < B --------(iii), E > C ---------(iv), C > D ---------(v)

from (i) and (v), we get A > C > D ---------(I)

from (iii) and (iv), we get B > E > C --------(II)

From (I) and (II) , it is clear that 'D' is the thinnest.

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Q:

In a row of thirty boys, R is fourth from the right end and W is tenth from the left end . How many boys are there between R and W?

A) 15	B) 16
C) 17	D) can't be determined

Answer & Explanation Answer: B) 16

Explanation:

W = 10th from the left

R = 4th from the right = (30 - 4 + 1= ) 27th from left

No of boys between R and W = (27 - 10) - 1 = 16

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Q:

In a class of 50 students M is eighth from top. H is 20th from bottom. How many students are there between M and H?

A) 22	B) 23
C) 24	D) can't be determined

Answer & Explanation Answer: A) 22

Explanation:

M is 8th from the top.

H is (50 - 20 + 1 =) 31 st from the top.

Number of students between M and H = (31 - 8- 1=)22

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Filed Under: Number, Ranking and Time Sequence Test
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