Official Paper

PYST 16: IB Security Assistant (Executive) Official Paper - Logical Ability & Reasoning (Held On: 30 Sept, 2025 Shift 4) (Previous Year Paper)

20 questions · 15 minutes · with answers · free

Attempt as Timed Mock Test

Test (20 questions)

1

If 1 is added to each odd digit and 1 is subtracted from each even digit in the number 5362178, how many digits will appear more than once in the new number thus formed?

  1. ((a))

    Two

  2. ((b))

    Three

  3. ((c))

    One

  4. ((d))

    None

Show Answer
Answer: ((d))

None

Given number 5362178

1 is added to each odd digit and 1 is subtracted from each even digit in the number

Hence, the correct answer is "Option 4"

2

In a certain code language,

A = B means 'A is the sister of B',

A $ B means 'A is the brother of B',

A@B means 'A is the wife of B',

and A * B means 'A is the father of B'.

<br>

How is A related to K if 'A = R $ F* B @ K'?

  1. ((a))

    father's sister

  2. ((b))

    Wife

  3. ((c))

    Wife's father's sister

  4. ((d))

    Wife's sister

Show Answer
Answer: ((c))

Wife's father's sister

 

Hence, the correct answer is "Option 3"

3

In a certain code language, 'RIPE' is coded as '2784' and 'PEAR' is coded as '2948'. How is 'A' coded in that language?

  1. ((a))

    8

  2. ((b))

    2

  3. ((c))

    7

  4. ((d))

    9

Show Answer
Answer: ((d))

9

'R I P E ' -  '2 7 8 4'

'P E A R' - '2 9 4 8'

Code for A is 9.

Hence, the correct answer is "Option 4"

4

Each of P, Q, R, S, T, U and V has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. V has an exam on Tuesday. Exactly 3 people have an exam between V and Q. T has an exam immediately before U and S has an exam immediately after U. Only 1 person has an exam between T and R.

Who has an exam on Sunday?

  1. ((a))

    P

  2. ((b))

    R

  3. ((c))

    S

  4. ((d))

    T

Show Answer
Answer: ((a))

P

Each of P, Q, R, S, T, U and V has an exam on a different day of a week starting from Monday and ending on Sunday of the same week.

  • V has an exam on Tuesday.
  • Exactly 3 people have an exam between V and Q.
  • T has an exam immediately before U and S has an exam immediately after U.
  • Only 1 person has an exam between T and R.

 

The Final Arrangement is, 

MonR
TueV
WedT
ThuU
FriS
SatQ
SunP

 

Hence, the correct answer is "Option 1"

5

If 'A' stands for '÷', 'B' stands for 'x', 'C' stands for '+' and 'D' stands for '-', what will come in place of the question mark (?) in the following equation?

<br>

17 B 6 D 18 A 2 C 4 = ?

  1. ((a))

    97

  2. ((b))

    85

  3. ((c))

    82

  4. ((d))

    90

Show Answer
Answer: ((a))

97

Given Equation: 17 B 6 D 18 A 2 C 4 = ?

'A' stands for '÷', 'B' stands for 'x', 'C' stands for '+' and 'D' stands for '-'

17 B 6 D 18 A 2 C 4 = ?

17 x 6 - 18 ÷ 2 + 4 = ?

17 x 6 - 9+ 4 = ?

102 + 4 - 9 = ?

106 - 9 = ?

Hence, the correct answer is "Option 1"

6

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.

<br>

Statements:

Some tablets are capsules.

All capsules are injections.

<br>

Conclusions:

(I): Some tablets are injections.

(II): All injections are capsules.

  1. ((a))

    Only conclusion (II) follows

  2. ((b))

    Neither conclusion (I) nor (II) follows

  3. ((c))

    Both conclusions (I) and (II) follow

  4. ((d))

    Only conclusion (I) follows

Show Answer
Answer: ((d))

Only conclusion (I) follows

The least possible Venn diagram is as follows:

Conclusions:

(I): Some tablets are injections.- True (Some tablets are capsules.All capsules are injections.Some tablets are injections is True)

(II): All injections are capsules. - False (Some tablets are capsules.All capsules are injections. Hence, it is false)

Only conclusion (I) follows

Hence, the correct answer is "Option 4"

7

Seven people, X, Y, Z, C, D, E and F, are sitting around a circular table facing the centre of the table. E sits fourth to the right of Z. Only two people sit between D and X when counted from the left of D. F sits third to the left of Y. C is an immediate neighbour of Y and X. How many people sit between D and C when counted from the right of D?

  1. ((a))

    One

  2. ((b))

    Three

  3. ((c))

    Four

  4. ((d))

    Two

Show Answer
Answer: ((d))

Two

Seven people, X, Y, Z, C, D, E and F, are sitting around a circular table facing the centre of the table.

  • E sits fourth to the right of Z.
  • Only two people sit between D and X when counted from the left of D.
  • F sits third to the left of Y.
  • C is an immediate neighbour of Y and X

The Final Arrangement is,

Hence, the correct answer is "Option 4"

8

Refer to the following letter series and answer the question that follows. Counting to be done from left to right only.

<br>

(Left) X W B Y T O R U X B B W S O V (Right)

<br>

How many letters are there in the English alphabetical series between the letter which is fourth from the right end and seventh from the left end of the given series?

  1. ((a))

    Three

  2. ((b))

    Four

  3. ((c))

    Two

  4. ((d))

    One

Show Answer
Answer: ((b))

Four

Given : (Left) X W B Y T O R U X B B W S O V (Right)

(Left) X W B Y T O R U X B B W S O V (Right)

S,T,U and V.

Hence, the correct answer is "Option 2

9

G starts from Point A and drives 18 km towards the west. He then takes a left turn, drives 16 km, turns left and drives 21 km. He then takes a left turn and drives 23 km. He takes a final left turn, drives 3 km and stops at Point P. How far (shortest distance) and towards which direction should he drive in order to reach Point A again? (All turns are 90-degree turns only, unless specified.)

  1. ((a))

    6 km to the east

  2. ((b))

    7 km to the south

  3. ((c))

    4 km to the north

  4. ((d))

    5 km to the west

Show Answer
Answer: ((b))

7 km to the south

  • G starts from Point A and drives 18 km towards the west.
  • He then takes a left turn, drives 16 km, turns left and drives 21 km.
  • He then takes a left turn and drives 23 km.
  • He takes a final left turn, drives 3 km and stops at Point P

The Final Arrangement is,

Hence, the correct answer is "Option 2"

10

Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which is the letter-cluster pair that DOES NOT belong to that group?

<br>

(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)

  1. ((a))

    NR-IK

  2. ((b))

    TX-OR

  3. ((c))

    QU-LO

  4. ((d))

    KO-FI

Show Answer
Answer: ((a))

NR-IK

alpha teb

The pattern followed here is:

Hence, the correct answer is "Option 1"

11

In a certain code language,

A + B means 'A is the mother of B',

A - B means 'A is the brother of B',

A x B means 'A is the wife of B',

A % B means 'A is the father of B' and

A # B means 'A is the daughter of B'.

How is L related to R if 'R - V # N # G x L'?

  1. ((a))

    Sister's son

  2. ((b))

    Daughter's son

  3. ((c))

    Mother's brother

  4. ((d))

    Mother's father

Show Answer
Answer: ((d))

Mother's father

Family chart :

Common Diagram 28.01.2020 D3

Drawing the family tree as per the given information :

Mother's father

Hence, the correct answer is "Option 4"

12

Refer to the following letter and symbol series and answer the question that follows. Counting to be done from left to right only.

(Left) L P ? @ N F & ? @ Z Y N D C R T Z B = ? Q (Right)

How many such letters are there, each of which is immediately preceded by a symbol and also immediately followed by a letter?

  1. ((a))

    Three

  2. ((b))

    One

  3. ((c))

    Two

  4. ((d))

    Four

Show Answer
Answer: ((c))

Two

Given Series : (Left) L P ? @ N F & ? @ Z Y N D C R T Z B = ? Q (Right)

Required Conditions: Symbol, Letter, Letter

(Left) L P ? @ N F & ? @ Z Y N D C R T Z B = ? Q (Right)

@ N F and @ Z Y

Hence, the correct answer is "Option 3"

13

What should come in place of the question mark (?) in the given series?

19 36 70 121 189 ?

  1. ((a))

    291

  2. ((b))

    267

  3. ((c))

    274

  4. ((d))

    276

Show Answer
Answer: ((c))

274

The logic follows here, 

Hence, the correct answer is "Option 3"

14

EV 7 is related to AQ 2 in a certain way. In the same way, TJ 5 is related to PE 0. To which of the following is SO -2 related, following the same logic?

  1. ((a))

    PJ -7

  2. ((b))

    OI -5

  3. ((c))

    OJ -7

  4. ((d))

    PI -5

Show Answer
Answer: ((c))

OJ -7

alpha teb

The pattern followed here is

SO -2 related OJ -7.

Hence, the correct answer is "Option 3"

15

Which of the following letter-clusters will replace the question mark (?) in the given series to make it logically complete?

PLE -1 RJH -3 THK -9 VFN -27 ?

  1. ((a))

    GHY -22

  2. ((b))

    QIO -31

  3. ((c))

    XDQ -81

  4. ((d))

    MHD -73

Show Answer
Answer: ((c))

XDQ -81

alpha teb

The pattern followed here is:

Hence, the correct answer is "Option 3"

16

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 conclusion(s) logically follow(s) from the statements.

<br>

Statements:

Some glasses are doors.

All walls are doors.

<br>

Conclusions:

(I) Some glasses are walls.

(II) All doors are walls.

  1. ((a))

    Only conclusion (I) follows.

  2. ((b))

    Neither conclusion (I) nor (II) follows.

  3. ((c))

    Only conclusion (II) follows.

  4. ((d))

    Both conclusions (I) and (II) follow.

Show Answer
Answer: ((b))

Neither conclusion (I) nor (II) follows.

The least possible Venn diagram is as follows:

Conclusions:

(I) Some glasses are walls.- False (Some glasses are doors. All walls are doors.As their is no direct relation between glasses and walls.Hence, it is false)

(II) All doors are walls. - False (All walls are doors. All doors are walls may be it is possible but not definite.Hence, it is false)

Neither conclusion (I) nor (II) follows.

Hence, the correct answer is "Option 2"

17

In a certain code language, 'PAST' is coded as '0128' and 'STEP' is coded as '6102'. What is the code for 'E' in the given code language?

  1. ((a))

    6

  2. ((b))

    1

  3. ((c))

    2

  4. ((d))

    0

Show Answer
Answer: ((a))

6

'PAST' is coded as '0128' and 'STEP' is coded as '6102'

 'P A S T' -  '0128'  

'S T E P'- '6102'

Code for E is 6.

Hence, the correct answer is "Option 1"

18

If 'A' stands for '÷', 'B' stands for '×', 'C' stands for '+' and 'D' stands for '−', what will come in place of the question mark (?) in the following equation?

17 B 6 D 18 A 2 C 4 = ?

  1. ((a))

    97

  2. ((b))

    85

  3. ((c))

    82

  4. ((d))

    90

Show Answer
Answer: ((a))

97

Given Equation:  17 B 6 D 18 A 2 C 4 = ?

'A' stands for '÷', 'B' stands for '×', 'C' stands for '+' and 'D' stands for '−'

⇒17 x 6 - 18 ÷ 2 + 4 = ?

⇒17 x 6 - 9 + 4 = ?

⇒102 + 4 - 9 = ?

⇒106 - 9 = ?

⇒97

Hence, the correct answer is "Option 1"

19

A, B, C, D, E, F and G are sitting around a circular table facing the centre. C sits third to the left of B. A sits second to the left of E. Only B sits between G and A. D is not an immediate neighbour of C. How many people sit between G and E when counted from the right of G?

  1. ((a))

    4

  2. ((b))

    3

  3. ((c))

    2

  4. ((d))

    1

Show Answer
Answer: ((b))

3

A, B, C, D, E, F and G are sitting around a circular table facing the centre.

  • C sits third to the left of B.
  • A sits second to the left of E.
  • Only B sits between G and A.
  • D is not an immediate neighbour of C

The Final Arrangement is, 

Hence, the correct answer is "Option 2"

20

Each of P, Q, R, S, T, U and V has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. S has an exam on Tuesday. Exactly 2 people have an exam between S and T. Q has an exam immediately before U and V has an exam immediately after R. Only 1 person has an exam between U and R. Who has an exam on Monday?

  1. ((a))

    U

  2. ((b))

    Q

  3. ((c))

    P

  4. ((d))

    V

Show Answer
Answer: ((c))

P

Each of P, Q, R, S, T, U and V has an exam on a different day of a week starting from Monday and ending on Sunday of the same week.

  • S has an exam on Tuesday.
  • Exactly 2 people have an exam between S and T.
  • Q has an exam immediately before U and V has an exam immediately after R.
  • Only 1 person has an exam between U and R

The Final Arrangement is, 

MonP
TueS
WedQ
ThuU
FriT
SatR
SunV

 

Hence, the correct answer is "Option 3"

Attempt this paper under real exam conditions

Timed interface, section switching, instant scoring, and question-by-question analytics — free.

Start Timed Attempt