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Question 161

IB Security Assistant 2023• Logical Ability & Reasoning

In a gathering, seven members (A, B, C, D, E, F, G) are sitting in a row facing north. Only two people sit to the left of E. F sits to the immediate right of E. C sits to the immediate left of B. D is not sitting at the extreme end of the row. G sits at the extreme left end of the row. Neither A nor D is the immediate neighbour of the person placed exactly in the middle of the row. Find the person who sits at the extreme right end of the row.

  1. AOption (a)

    C

  2. BOption (b)

    B

  3. COption (c)

    D

  4. DOption (d)

    A

View answer & explanation

Correct answer

Answer: (d)D.

A

Why this answer is correct

Given: Seven members (A, B, C, D, E, F, G) are sitting in a row facing north.

Only two people sit to the left of E. F sits to the immediate right of E.

G sits at the extreme left end of the row.

C sits to the immediate left of B. D is not sitting at the extreme end of the row.

Neither A nor D is the immediate neighbour of the person placed exactly in the middle of the row.

A is sitting at the extreme right end of the row.

Hence, the correct answer is 'Option 4'.

Question 162

IB Security Assistant 2023• Logical Ability & Reasoning

In a row of certain students, Asha is sitting at 532 from the right and 462 from the left end. Find out the total number of persons in that row.

  1. AOption (a)

    991

  2. BOption (b)

    992

  3. COption (c)

    990

  4. DOption (d)

    993

View answer & explanation

Correct answer

Answer: (d)D.

993

Why this answer is correct

The logic followed here is:

Asha is sitting at 532 from the right and 462 from the left end.

Total number of person in that row = Rank of Asha from Right + Rank of Asha from Left - 1.

= 532 + 462 - 1

= 994 - 1

= 993.

Hence, the correct answer is 'Option 4'.

Question 163

IB Security Assistant 2023• Logical Ability & Reasoning

Soumya is 17th from the left end and 13th to the right of Kiran who is 37th from the right end. If all of them are facing North. Find out the total number of persons in the row.

  1. AOption (a)

    41

  2. BOption (b)

    40

  3. COption (c)

    44

  4. DOption (d)

    43

View answer & explanation

Correct answer

Answer: (b)B.

40

Why this answer is correct

The logic followed here is:

The Rank of Soumya from the left end = 17th.

The Rank of Kiran from the right end = 37th.

The Rank of Soumya from the right end = Rank of Kiran from the right end - 13th.

37 - 13 = 24th.

Total number of person in the row = Rank of Soumya from the left end + Rank of Soumya from the right end - 1.

= 17 + 24 - 1 = 40.

Hence, the correct answer is 'Option 2'.

Question 164

IB Security Assistant 2023• Logical Ability & Reasoning

In a certain code language, ‘BLOCK’ is written as ‘ELUCT’, and ‘FLANK’ is written as ‘ILGNT’. How will ‘WHILE’ be written in that language?

  1. AOption (a)

    YHMLE

  2. BOption (b)

    ZHOLN

  3. COption (c)

    YGOMN

  4. DOption (d)

    ZGOML

View answer & explanation

Correct answer

Answer: (b)B.

ZHOLN

Why this answer is correct

The position and positional values of English Alphabets are as follows:

The logic followed here is:

For, 'BLOCK' is written as 'ELUCT'.

For, 'FLANK' is written as 'ILGNT'.

Similarly, 'WHILE' will be:

Thus, 'WHILE' can be written as 'ZHOLN'.

Hence, the correct answer is 'Option 2'.

Question 165

IB Security Assistant 2023• Logical Ability & Reasoning

Select the correct combination of mathematical signs that can sequentially replace the * signs and balance the given equation.

181 * 7 * 9 * 18 * 9 = 120

  1. AOption (a)

    ÷ × + −

  2. BOption (b)

    − × + ÷ 

  3. COption (c)
    • × ÷ −
  4. DOption (d)

    × + − ÷

View answer & explanation

Correct answer

Answer: (b)B.

− × + ÷ 

Why this answer is correct

Given Equation: 181 * 7 * 9 * 18 * 9 = 120

BODMAS Rule:

Let's check each option one by one:

Option 1) ÷ × + −

Given: 181 * 7 * 9 * 18 * 9 = 120

After replacing * signs we get;

⇒ 181 ÷ 7 × 9 + 18 - 9 = 120

⇒ 25.8 × 9 + 18 - 9 = 120

⇒ 232.2 + 18 - 9 = 120

⇒ 250.2 - 9 = 241.2

⇒ 241.2 ≠ 120.

Option 2) − × + ÷ 

Given: 181 * 7 * 9 * 18 * 9 = 120

After replacing * signs we get;

⇒ 181 - 7 × 9 + 18 ÷ 9 = 120

⇒ 181 - 7 × 9 + 2 = 120

⇒ 181 + 2 - 63 = 120

⇒ 183 - 63 = 120

⇒ 120 = 120.

Option 3) + × ÷ −

Given: 181 * 7 * 9 * 18 * 9 = 120

After replacing * signs we get;

⇒ 181 + 7 × 9  ÷ 18 - 9 = 120

⇒ 181 + 7 × 0.5 - 9 = 120

⇒ 181 + 3.5 - 9 = 120

⇒ 184.5 - 9 = 175.5

⇒ 175.5  ≠ 120.

Option 4) × + − ÷

Given: 181 * 7 * 9 * 18 * 9 = 120

After replacing * signs we get;

⇒ 181 × 7 + 9 - 18 ÷  9 = 120

⇒ 181 × 7 + 9 - 2 = 120

⇒ 1267 + 9 - 2 = 120

⇒ 1276 - 2 = 120

⇒ 1276 ≠ 120.

Hence, the correct answer is 'Option 2'.

Question 166

IB Security Assistant 2023• Logical Ability & Reasoning

Assuming the given statement to be true, find which of the following conclusions among given two is/are true.

Statement

D > T ≤ B > A, P ≤ R > S ≠ D

Conclusions

1) P ≠ D

  1. T = A
  1. AOption (a)

    None of the conclusions follow.

  2. BOption (b)

    Only conclusion 1 follows.

  3. COption (c)

    Only conclusion 2 follows.

  4. DOption (d)

    Both conclusions 1 and 2 follow

View answer & explanation

Correct answer

Answer: (a)A.

None of the conclusions follow.

Why this answer is correct

Statements: D > T ≤ B > A, P ≤ R > S ≠ D

After combining the statements, we get: P ≤ R > S ≠ D > T ≤ B > A

Conclusions: 

  1. P ≠ D → This does not follow as (P ≤ R > S ≠ D, there is no definite relation can be forms between P and D).

  2. T = A → This does not follow as (T ≤ B > A, there is no definite relation can be forms between T and A).

Thus, None of the conclusion follow.

Hence, the correct answer is 'Option 1'.

Question 167

IB Security Assistant 2023• Logical Ability & Reasoning

Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

Statements:

  1. All books are purses.
  2. All yellow are purses .
  3. Some papers are yellow.

Conclusions:

I. Some books are yellow.

II. Some purses are papers.

  1. AOption (a)

    Both conclusions I and II follow.

  2. BOption (b)

    Only conclusion II follows.

  3. COption (c)

    Neither conclusion I nor II follow. 

  4. DOption (d)

    Only conclusion I follows.

View answer & explanation

Correct answer

Answer: (b)B.

Only conclusion II follows.

Why this answer is correct

The least possible Venn diagram for the given statement is:

Conclusions:

I. Some books are yellow → Does not follow (As, there is no definite relation given between Books and Yellow, so it can be possible only).

II. Some purses are papers → Follows (The part of paper which also yellow is purse as it is given in statement that some paper are yellow).

Thus, only conclusion II follows.

Hence, the correct answer is 'Option 2'.

Question 168

IB Security Assistant 2023• Logical Ability & Reasoning

Diksha walks 20 m towards the south, turns left and walks 30 m, after which, she turns right and walks 30 m. Again, she turns right and walks 30 m, after which, she takes a final right turn and walks 20 m. How far is she from the starting point?

  1. AOption (a)

    40 m 

  2. BOption (b)

    50 m

  3. COption (c)

    30 m

  4. DOption (d)

    10 m

View answer & explanation

Correct answer

Answer: (c)C.

30 m

Why this answer is correct

Given:

Diksha walks 20 m towards the south, turns left and walks 30 m, after which, she turns right and walks 30 m.

Again, She turns right and walks 30 m, after which, she takes a final right turn and walks 20 m.

The Distance between the Starting point and Final point is 30m.

Hence, the correct answer is 'Option 3'.

Question 169

IB Security Assistant 2023• Logical Ability & Reasoning

Four words have been given, out of which three are alike in some manner and one is different. Select the one that is different.

Please note that the reasoning for the answer is to be deduced considering the actual meaning of the words and not basis the counting of letters, vowels, consonants or any other such parameters.

  1. AOption (a)

    Chisel

  2. BOption (b)

    Rake

  3. COption (c)

    Sickle

  4. DOption (d)

    Shovel

View answer & explanation

Correct answer

Answer: (a)A.

Chisel

Why this answer is correct

The logic followed here is:

1. Chisel: a tool with a sharp end that is used for cutting or shaping wood or stone.

  1. Rake: a garden tool with a long handle and a row of metal teeth, used for collecting leaves or making the earth smooth.
  2. Sickle: a tool with a short handle and a long, curved metal part with a sharp edge (a blade) that is used for cutting long grass, corn, etc.
  3. Shovel: a tool used for picking up and moving earth, snow, sand, etc.

Here, Except "Chisel" all the three are tools used in garden. Chisel is used in cutting or shaping wood or stone.

Hence, the correct answer is 'Option 1'.

Question 170

IB Security Assistant 2023• Logical Ability & Reasoning

Veer is the brother of Rohan and Hari. Rita is Hari’s mother. Ram is Rohan’s father. How is Veer related to Ram?

  1. AOption (a)

    Son’s son

  2. BOption (b)

    Brother 

  3. COption (c)

    Father

  4. DOption (d)

    Son

View answer & explanation

Correct answer

Answer: (d)D.

Son

Why this answer is correct

Family Chart:

Given:

Veer is the brother of Rohan and Hari. Rita is Hari’s mother and Ram is Rohan’s father.

So, Veer is the son of Ram.

Hence, the correct answer is 'Option 4'.