PYST 15: IB Security Assistant (Executive) Official Paper - Logical Ability & Reasoning (Held On: 30 Sept, 2025 Shift 3) (Previous Year Paper)

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?

21 B 4 D 72 A 8 C 7 = ?

In a certain code language, 'we are here' is written as 'yt bg ji' and 'you know we' is coded as 'kl bg gb'. How is 'we' coded in that language?

In the following number-pairs, the second number is obtained by applying certain mathematical operation(s) to the first number. Select the number-pair in which the numbers are related in the same way as are the numbers of the following pairs.

(NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 - Operations on 13 such as adding to/subtracting from/multiplying with 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)

9,85

8,68

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. U has an exam on Wednesday. Exactly 4 people have exams between P and V, neither of whom has an exam on Monday. Q has an exam immediately before R and S has an exam immediately after R. T has an exam immediately before P. How many people have exams between U and V?

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

6 9 21 39 81 ?

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

(Left) CCQOISJSMXHUVQRHDPCHY (Right)

How many such consonants are there, each of which is immediately preceded by a vowel and also immediately followed by a vowel?

P, Q, R, S, T, U and V are sitting in a row, facing north. Only two people sit to the left of Q. Only three people sit between Q and S. Only one person sits between S and V. U sits to the immediate left of P. T is not an immediate neighbour of S. How many people sit between U and V?

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

11 17 32 58 93 139 ?

Refer to the following letter and symbol series and answer the question that follows.

Counting to be done from left to right only.

(Left) RLZT@$ODU%WN#*KXV£YA & QPS (Right)

How many such letters are there that are immediately preceded by a letter and also immediately followed by another symbol$?

Select the pair that follows the same pattern as the one followed by the two pairs given below. Both pairs follow the same pattern.

YGB: WJX

ΝΑΙ : LDE

In a certain code language,

'A + B' means 'A is the daughter 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'.

How is C related to M if 'C + V X R - N - M'?

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:

All vegetables are lemons.

All fruits are lemons.

Conclusions:

(I): Some vegetables are fruits

(II): Some lemons are fruits

In a certain code language, 'GREAT' is coded as '42571', 'FRESH' is coded as '37648' and 'FLASH' is coded as '68953'. What is the code for 'L' in that language?

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. No one has exam before Q. Only three people have exams between Q and V. Only one person has an exam between V and P. U has an exam on Wednesday. T has an exam on one of the days after S but on one of the days before R. How many people have exams between R and U?

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:

Some trees are cows.

All cows are fishes.

Conclusions:

(I) Some trees are fishes.

(II) All fishes are cows.

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

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

Vishal starts from Point A and drives 6 km towards west. He then takes a left turn, drives 1 km, turns left and drives 8 km. He then takes a left turn and drives 5 km. He takes a final left turn, drives 2 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° turns only unless specified.)

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?

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

In a certain code language,

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

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

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

and A & B means 'A is the sister of B'.

How is B related to W if 'B # F + R @ H & W'?

Six people, M, N, O, P, X and Y, are sitting in a row facing north. Exactly four people sit between Y and O. P sits second to the right of O. N sits to the immediate right of X. Who among them sits to the immediate left of M?