Symbols and Notations : Logical Reasoning

1.

How is S related to T in the Expression: T / P + S ?

   A.) Daughter
   B.) Sister
   C.) Niece
   D.) Aunt

Answer: Option 'D'

T / P + S 
S -> Sister P ,
P -> Mother T 
Therefore, P is the mother of T and S is the sister of P. 
Then S is Aunt of T.

  • Instructions (3 - 4) :-
    Thease questions are based on the following information.
    ( I ) 'A * B' means 'A is father of B'
    ( II ) 'A

2.

In the expression D + F * O / P, how is O related to D?

   A.) Grand daughter
   B.) Son
   C.) Grand son
   D.) Daughter

Answer: Option 'C'

D + F * O / P 
D + F means D is mother of F 
F * O means F is father of O 
O * P means O is brother of P 

3.

Statements: 
Z @ Y, Y # K, K % M, M @ T 
Conclusions: 
I. Z @ M 
II. Y @ T 
III. Z # K

   A.) I only
   B.) II and III only
   C.) Either I or II only
   D.) None is true

Answer: Option 'D'

Statements: Z @ Y -> Z > Y 
Y # K -> Y < K 
K % M -> K = M 
M @ T -> M > T 
Therefore, Z > Y < K = M > T 
Conclusions: 
I. Z @ Y -> Z > Y (Not true ) 
II. Y @ T -> Y > T ( Not true) 
III.Z # K -> Z < K (Not true) 

  • Instructions : (5 - 7) -
    In the following questions, the Symbols @,

4.

Statements: 
C & D, D $ E, E © F 
Conclusions: 
I .F @ C 
II. E @ C

   A.) If only conclusion I is true
   B.) If only conclusion II is true
   C.) If either conclusion I or conclusion II is true
   D.) If both conclusions I and II are true.

Answer: Option 'D'

‘A $ B’ -> A !> B, therefore A = B. 
‘A @ B’ -> A B. 
‘A & B’ -> A !> B and A ‘A © B’ -> A !> B and A ‘A % B’ -> A C & D -> C < D 
D $ E -> D = E 
E © F -> E = F 
Therefore C < D = E = F 
Conclusions: 
1. F @ C -> F > C ( True ) 
2. E @ C -> E > C ( True )

  • Instructions (1-2) :-
    Thease questions are based on the following information.
    ( I ) 'A * B' means 'A is brother of B'
    ( II ) 'A / B' means 'B is mother of A'
    ( III ) 'A

5.

Which of the following means L is daughter of H?

   A.) L + K / J – H
   B.) H – J * R + L
   C.) L – J * H / K
   D.) L + W * R / H

Answer: Option 'B'

H – J * R + L 
L -> Sister R ,
R -> Brother J,
J -> Fother H 
Therefore, L is daughter of H.

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