Number, Ranking and Time Sequence Test Questions and Answers

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.

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: Pearl Towers is taller than Sky Towers but shorter than Unity Towers. Unity Towers and Cyber Towers are of same height. Pearl Towers is shorter than Indus Towers. Amongst the buildings, who is the second shortest?

Correct answer: Pearl TowerThe comparisons give \( \text{Sky} < \text{Pearl} < \text{Unity} = \text{Cyber} \) and \( \text{Pearl} < \text{Indus} \). Sky is therefore the shortest and Pearl the next shortest, the other three all standing above it.

Q: How many such 5s are there in the following number sequence each of which is immediately preceded by 3 or 4 but not immediately followed by 8 or 9? 3 5 9 5 4 5 5 3 5 8 4 5 6 7 3 5 7 5 5 4 5 2 3 5 1 0

Correct answer: FiveFive 5s have a 3 or a 4 immediately before them and something other than 8 or 9 after them - the 5s at the sixth, twelfth, sixteenth, twenty-first and twenty-fourth places. The rest are ruled out either by what precedes them or by an 8 or 9 following. So the answer is five.

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

Correct answer: 32Rohan is counted from both ends, so the class holds \[ 7 + 26 - 1 = \mathbf{32} \] students.

Q: Satish remembers that his brother’s birthday is after fifteenth but before eighteenth of February whereas his sister Kajal remembers that her brother’s birthday is after sixteenth but below nineteenth of February. On which day in February is Satish’s brother’s birthday?

According to Satish, the brother’s birthday is on one of the days among 16th and 17th February. According to Kajal, the brother’s birthday is on one of the days among 17th and 18th February. Clearly, Satish’s brother’s birthday is on the day common to both the above groups, i.e., 17th February.

Q: In these series given below, how many 8s are there each of which is exactly divisible by its immediately preceding as well as succeeding numbers? 2 8 3 8 2 4 8 2 4 8 6 8 2 8 2 4 8 3 8 2 8 6

Correct answer: TwoAn 8 qualifies only if both its neighbours divide it exactly, so both must be among 1, 2, 4 and 8. Two do: the 8 standing between 4 and 2, and the 8 standing between 2 and 2. The rest have a 3 or a 6 on one side, and neither divides 8. So the answer is two.

Q: The position of the first and the second digits in the numbers 94316875 are interchanged. Similarly, the positions of the third and fourth digits are interchanged and so on. Which of the following will be the third to the left of the seventh digit from the left end after the rearrangement?

Correct answer: None of theseInterchanging the digits in pairs turns 94316875 into 49138657. The seventh digit from the left is then 5, and the third place to its left is the fourth digit, 3 - which is not among the choices offered, so the answer is none of these.

Important Instructions

151.

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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152.

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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153.

Pearl Towers is taller than Sky Towers but shorter than Unity Towers. Unity Towers and Cyber Towers are of same height. Pearl Towers is shorter than Indus Towers. Amongst the buildings, who is the second shortest?

A.Pearl Tower
B.Sky Tower
C.Indus Tower
D.Unity Tower

Answer: A

Correct answer: Pearl Tower

The comparisons give \( \text{Sky} < \text{Pearl} < \text{Unity} = \text{Cyber} \) and \( \text{Pearl} < \text{Indus} \). Sky is therefore the shortest and Pearl the next shortest, the other three all standing above it.

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154.

How many such 5s are there in the following number sequence each of which is immediately preceded by 3 or 4 but not immediately followed by 8 or 9?

3 5 9 5 4 5 5 3 5 8 4 5 6 7 3 5 7 5 5 4 5 2 3 5 1 0

A.None
B.Three
C.Four
D.Five

Answer: D

Correct answer: Five

Five 5s have a 3 or a 4 immediately before them and something other than 8 or 9 after them - the 5s at the sixth, twelfth, sixteenth, twenty-first and twenty-fourth places. The rest are ruled out either by what precedes them or by an 8 or 9 following. So the answer is five.

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155.

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

A.31
B.32
C.33
D.34

Answer: B

Correct answer: 32

Rohan is counted from both ends, so the class holds \[ 7 + 26 - 1 = \mathbf{32} \] students.

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156.

Satish remembers that his brother’s birthday is after fifteenth but before eighteenth of February whereas his sister Kajal remembers that her brother’s birthday is after sixteenth but below nineteenth of February. On which day in February is Satish’s brother’s birthday?

A.16th
B.17th
C.18th
D.19th

Answer: B

According to Satish, the brother’s birthday is on one of the days among 16th and 17th February.

According to Kajal, the brother’s birthday is on one of the days among 17th and 18th February.

Clearly, Satish’s brother’s birthday is on the day common to both the above groups, i.e., 17th February.

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157.

In these series given below, how many 8s are there each of which is exactly divisible by its immediately preceding as well as succeeding numbers?

2 8 3 8 2 4 8 2 4 8 6 8 2 8 2 4 8 3 8 2 8 6

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

Answer: B

Correct answer: Two

An 8 qualifies only if both its neighbours divide it exactly, so both must be among 1, 2, 4 and 8. Two do: the 8 standing between 4 and 2, and the 8 standing between 2 and 2. The rest have a 3 or a 6 on one side, and neither divides 8. So the answer is two.

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158.

The position of the first and the second digits in the numbers 94316875 are interchanged. Similarly, the positions of the third and fourth digits are interchanged and so on. Which of the following will be the third to the left of the seventh digit from the left end after the rearrangement?

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

Answer: D

Correct answer: None of these

Interchanging the digits in pairs turns 94316875 into 49138657. The seventh digit from the left is then 5, and the third place to its left is the fourth digit, 3 - which is not among the choices offered, so the answer is none of these.

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