Number, Ranking and Time Sequence Test Questions and Answers

Q: In a class, seven students are standing in a row. Q is standing left to R but right to P. O is standing right to N and left to P. Similarly, S is standing right to R and left to T. Find out who is standing in the middle ?

Correct answer: QTaking the conditions in turn: N, O, P in that order; then P, Q, R; then R, S, T. Joining them gives the single row N O P Q R S T, and the middle of seven is the fourth place - Q.

Q: In a row of boys, Punit’s position from the left end is 33rd and Ankit’s position from the right end is 25th. After interchanging their position, Punit’s position becomes 45th from the left end. How many boys are there in the row?

Correct answer: 69After the exchange Punit stands 45th from the left, which was Ankit’s place - so Ankit was 45th from the left and 25th from the right: \[ 45 + 25 - 1 = \mathbf{69} \]

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

Correct answer: 32In a class of 49, a rank of 18 from the top is \[ 49 - 18 + 1 = \mathbf{32} \] from the last.

Q: Manisha ranked sixteenth from the top and twenty-ninth from the bottom among those who passed an examination. Six boys did not participate in the competition and five failed in it. How many boys were there in the class?

Correct answer: 55Among those who passed, Manisha is 16th from the top and 29th from the bottom, so \( 16 + 29 - 1 = 44 \) passed. Five more failed, making 49 who sat the examination, and six did not take part at all: \[ 44 + 5 + 6 = \mathbf{55} \]

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

Correct answer: 6The series counts down to 1 and then starts again one lower each time: 9 to 1, then 8 to 1, then 7 to 1. The next block therefore begins at 6.

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

Correct answer: 3The arrangement holds 33 digits, so the twelfth from the right end is the \( 33-12+1 = 22 \)nd from the left, which is 2. Counting five places to its right lands on the 27th digit, 3.

Q: In the English alphabet, which letter is 13th from right end?

Correct answer: NThere are 26 letters, so the 13th from the right end is the \[ 26 - 13 + 1 = 14 \text{th from the left} \] which is N.

Q: Hitesh, Sunny, Vicky, Nitin and Bharat are arranged in ascending order of the height from the top. Hitesh is at third place. Bharat is between Nitin andHitesh while Nitin is not at the bottom. Who has the maximum height among them?

Correct answer: NitinHitesh is third, Bharat lies between Nitin and Hitesh, and Nitin is not at the bottom - which leaves only one arrangement, with Nitin at the head of it. So Nitin is the tallest.

Important Instructions

101.

In a class, seven students are standing in a row. Q is standing left to R but right to P. O is standing right to N and left to P. Similarly, S is standing right to R and left to T. Find out who is standing in the middle ?

Answer: A

Correct answer: Q

Taking the conditions in turn: N, O, P in that order; then P, Q, R; then R, S, T. Joining them gives the single row N O P Q R S T, and the middle of seven is the fourth place - Q.

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102.

In a row of boys, Punit’s position from the left end is 33rd and Ankit’s position from the right end is 25th. After interchanging their position, Punit’s position becomes 45th from the left end. How many boys are there in the row?

A.70
B.71
C.69
D.74

Answer: C

Correct answer: 69

After the exchange Punit stands 45th from the left, which was Ankit’s place - so Ankit was 45th from the left and 25th from the right: \[ 45 + 25 - 1 = \mathbf{69} \]

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103.

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

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

Answer: C

Correct answer: 32

In a class of 49, a rank of 18 from the top is \[ 49 - 18 + 1 = \mathbf{32} \] from the last.

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104.

Manisha ranked sixteenth from the top and twenty-ninth from the bottom among those who passed an examination. Six boys did not participate in the competition and five failed in it. How many boys were there in the class?

A.40
B.44
C.50
D.55

Answer: D

Correct answer: 55

Among those who passed, Manisha is 16th from the top and 29th from the bottom, so \( 16 + 29 - 1 = 44 \) passed. Five more failed, making 49 who sat the examination, and six did not take part at all: \[ 44 + 5 + 6 = \mathbf{55} \]

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105.

If it is possible to form a number with the second, the fifth and the eighth digits of the number 31549786, which is the perfect square of a two - digit even number, which of the following will be the second digit of that even number ?

A.1
B.4
C.6
D.None of these

Answer: B

The 2nd, 5th and 8th digits of the number 31549786 are 1, 9 and 6 respectively.

The perfect square of a two - digit even number, formed using the digits 1, 9 and 6 is 196.

And, 14 x 14 = 196

So, the required even number is 14. Clearly, its second digit is 4.

Hence, the answer is (b).

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106.

If the positions of the first and the third digit within each number are interchanged, which of the following will be the third digit of the second lowest number ?

987, 514, 658, 487, 404, 269

Answer: D

According to the question, after the position of the first and third digit interchanged new numbers are
789, 415, 856, 784, 404, 962

962, 856, 789, 784, 404, 415
Here the second lowest number is 404 and the last digit of it is '4'.

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107.

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

Answer: D

Correct answer: 6

The series counts down to 1 and then starts again one lower each time: 9 to 1, then 8 to 1, then 7 to 1. The next block therefore begins at 6.

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108.

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

Answer: A

Correct answer: 3

The arrangement holds 33 digits, so the twelfth from the right end is the \( 33-12+1 = 22 \)nd from the left, which is 2. Counting five places to its right lands on the 27th digit, 3.

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109.

In the English alphabet, which letter is 13th from right end?

Answer: C

Correct answer: N

There are 26 letters, so the 13th from the right end is the \[ 26 - 13 + 1 = 14 \text{th from the left} \] which is N.

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110.

Hitesh, Sunny, Vicky, Nitin and Bharat are arranged in ascending order of the height from the top. Hitesh is at third place. Bharat is between Nitin andHitesh while Nitin is not at the bottom. Who has the maximum height among them?

A.Hitesh
B.Sunny
C.Vicky
D.Nitin

Answer: D

Correct answer: Nitin

Hitesh is third, Bharat lies between Nitin and Hitesh, and Nitin is not at the bottom - which leaves only one arrangement, with Nitin at the head of it. So Nitin is the tallest.

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