Number, Ranking and Time Sequence Test Questions and Answers

Q: Count each 7 which is not immediately preceded by 5 but is immediately followed by either 2 or 3. How many such 7’s are there? 5 7 2 6 5 7 3 8 3 7 3 2 5 7 2 7 3 4 8 2 6 7 8

Correct answer: 2Two 7s qualify: the one in 3 7 3, which is preceded by 3 and followed by 3, and the one in 2 7 3. The 7s in 5 7 2 and 5 7 3 are ruled out by the 5 before them, and the last 7 is followed by 8. So there are 2.

Q: How many 6’s are there in the following series of numbers which are preceded by 7 but not immediately followed by 9? 6 7 9 5 6 9 7 6 8 7 6 7 8 6 9 4 6 7 7 6 9 5 7 6 3

Correct answer: ThreeThree 6s have a 7 before them and something other than 9 after them: 7 6 8, 7 6 7 and 7 6 3. The 6 in 7 6 9 is ruled out by the 9 that follows it. So the count is three.

Q: How many 7’s are there in the following series which are not immediately followed by 3 but immediately preceded by 8? 8 9 8 7 6 2 2 6 3 2 6 9 7 3 2 8 7 2 7 7 8 7 3 7 7 9 4

Correct answer: 2Two 7s have an 8 immediately before them and something other than 3 after them: 8 7 6 and 8 7 2. The 7 in 8 7 3 is ruled out by the 3 that follows. So there are 2.

Q: Count each 1 in the following sequence of numbers that is immediately followed by 2, if 2 is not immediately followed by 3. How many such l’s are there? 1 2 1 3 4 5 1 2 3 5 2 1 2 6 1 4 5 1 1 2 4 1 2 3 2 1 7 5 2 1 2 5

Correct answer: 4Counting the 1s that are followed by a 2 which is not itself followed by a 3 gives 4. The pair 1 2 3 is excluded each time it occurs, because there the 2 is followed by a 3.

Q: How many 7’s are there in the following series which are preceded by 6 which is not preceded by 8? 8 7 6 7 8 6 7 5 6 7 9 7 6 1 6 7 7 6 8 8 6 9 7 6 8 7

Correct answer: None of theseEach 7 that has a 6 before it must be checked for what precedes that 6. Working through the row, every such 6 turns out to have an 8 before it, or the 7 has no 6 before it at all - so the count is not one of the figures offered, and the answer is none of these.

Q: In the following list of numerals, how many 2’s are followed by l’s but not preceded by 4? 4 2 1 2 1 4 2 1 1 2 4 4 4 1 2 2 1 2 1 4 4 2 1 4 2 1 2 1 2 4 1 4 2 1 2 4 1 4 6

Correct answer: FourGoing through the list, four of the 2s are immediately followed by a 1 and are not immediately preceded by a 4. The rest fail one test or the other - either a 4 stands before them or something other than 1 follows. So the answer is four.

Q: In a row of trees, one tree is fifth from either end of the row. How many trees are there in the row?

Correct answer: 9The tree is counted from both ends, so the four trees before it and the four after it, together with the tree itself, make up the row: \[ 5 + 5 - 1 = \mathbf{9} \] The 1 is subtracted because the tree itself is counted twice.

Q: In a queue, Amrita is 10th from the front while Mukul is 25th from behind and Mamta is just in the middle of the two. If there were 50 persons in the queue, what position does Mamta occupy from the front?

Correct answer: 18thMukul is 25th from behind in a queue of 50, so he is \( 50 - 25 + 1 = 26 \)th from the front. Mamta stands midway between Amrita at 10 and Mukul at 26: \[ \frac{10 + 26}{2} = \mathbf{18} \text{th from the front} \]

Q: Raman ranks sixteenth from the top and forty-ninth from the bottom in a class. How many students are there in the class ?

Correct answer: 64Raman is counted from both ends, so the class holds \[ 16 + 49 - 1 = \mathbf{64} \] students, the 1 being subtracted because Raman himself is counted twice.

Q: Sanjeev ranks seventh from the top and twenty-eighth from the bottom in a class. How many students are there in the class ?

Correct answer: 34Sanjeev is counted from both ends, so the class holds \[ 7 + 28 - 1 = \mathbf{34} \] students.

Important Instructions

61.

Count each 7 which is not immediately preceded by 5 but is immediately followed by either 2 or 3. How many such 7’s are there?

5 7 2 6 5 7 3 8 3 7 3 2 5 7 2 7 3 4 8 2 6 7 8

Answer: A

Correct answer: 2

Two 7s qualify: the one in 3 7 3, which is preceded by 3 and followed by 3, and the one in 2 7 3. The 7s in 5 7 2 and 5 7 3 are ruled out by the 5 before them, and the last 7 is followed by 8. So there are 2.

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62.

How many 6’s are there in the following series of numbers which are preceded by 7 but not immediately followed by 9?

6 7 9 5 6 9 7 6 8 7 6 7 8 6 9 4 6 7 7 6 9 5 7 6 3

A.One
B.Two
C.Three
D.Four

Answer: C

Correct answer: Three

Three 6s have a 7 before them and something other than 9 after them: 7 6 8, 7 6 7 and 7 6 3. The 6 in 7 6 9 is ruled out by the 9 that follows it. So the count is three.

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63.

How many 7’s are there in the following series which are not immediately followed by 3 but immediately preceded by 8?

8 9 8 7 6 2 2 6 3 2 6 9 7 3 2 8 7 2 7 7 8 7 3 7 7 9 4

A.10
B.3
C.2

Answer: C

Correct answer: 2

Two 7s have an 8 immediately before them and something other than 3 after them: 8 7 6 and 8 7 2. The 7 in 8 7 3 is ruled out by the 3 that follows. So there are 2.

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64.

Count each 1 in the following sequence of numbers that is immediately followed by 2, if 2 is not immediately followed by 3. How many such l’s are there?

1 2 1 3 4 5 1 2 3 5 2 1 2 6 1 4 5 1 1 2 4 1 2 3 2 1 7 5 2 1 2 5

Answer: B

Correct answer: 4

Counting the 1s that are followed by a 2 which is not itself followed by a 3 gives 4. The pair 1 2 3 is excluded each time it occurs, because there the 2 is followed by a 3.

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65.

How many 7’s are there in the following series which are preceded by 6 which is not preceded by 8?

8 7 6 7 8 6 7 5 6 7 9 7 6 1 6 7 7 6 8 8 6 9 7 6 8 7

A.Nil
B.One
C.Three
D.None of these

Answer: D

Correct answer: None of these

Each 7 that has a 6 before it must be checked for what precedes that 6. Working through the row, every such 6 turns out to have an 8 before it, or the 7 has no 6 before it at all - so the count is not one of the figures offered, and the answer is none of these.

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66.

In the following list of numerals, how many 2’s are followed by l’s but not preceded by 4?

4 2 1 2 1 4 2 1 1 2 4 4 4 1 2 2 1 2 1 4 4 2 1 4 2 1 2 1 2 4 1 4 2 1 2 4 1 4 6

A.Two
B.Three
C.Four
D.Five

Answer: C

Correct answer: Four

Going through the list, four of the 2s are immediately followed by a 1 and are not immediately preceded by a 4. The rest fail one test or the other - either a 4 stands before them or something other than 1 follows. So the answer is four.

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67.

In a row of trees, one tree is fifth from either end of the row. How many trees are there in the row?

A.8
B.9
C.10
D.11

Answer: B

Correct answer: 9

The tree is counted from both ends, so the four trees before it and the four after it, together with the tree itself, make up the row: \[ 5 + 5 - 1 = \mathbf{9} \] The 1 is subtracted because the tree itself is counted twice.

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68.

In a queue, Amrita is 10th from the front while Mukul is 25th from behind and Mamta is just in the middle of the two. If there were 50 persons in the queue, what position does Mamta occupy from the front?

A.20th
B.19th
C.18th
D.17th

Answer: C

Correct answer: 18th

Mukul is 25th from behind in a queue of 50, so he is \( 50 - 25 + 1 = 26 \)th from the front. Mamta stands midway between Amrita at 10 and Mukul at 26: \[ \frac{10 + 26}{2} = \mathbf{18} \text{th from the front} \]

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69.

Raman ranks sixteenth from the top and forty-ninth from the bottom in a class. How many students are there in the class ?

A.64
B.65
C.66
D.Cannot be determined

Answer: A

Correct answer: 64

Raman is counted from both ends, so the class holds \[ 16 + 49 - 1 = \mathbf{64} \] students, the 1 being subtracted because Raman himself is counted twice.

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70.

Sanjeev ranks seventh from the top and twenty-eighth from the bottom in a class. How many students are there in the class ?

A.37
B.36
C.35
D.34

Answer: D

Correct answer: 34

Sanjeev is counted from both ends, so the class holds \[ 7 + 28 - 1 = \mathbf{34} \] students.

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Number, Ranking and Time Sequence Test Questions and Answers

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Number, Ranking and Time Sequence Test Questions and Answers

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