ECAT Pre General Science Mathematics Chapter 3 Logic

• false A
• true B
• not valid C
• undefine D

10 is a even number or 0 is a natural number, then truth value of this disjunction is

• False A
• True B
• Not discussed C
• negation of first D

• p and q A
• p or q B
• p implies q C
• p is equivalent to q D

To draw conclusions front premises believed to be true, this way of reasoning is called

• deduction A
• induction B
• implication C
• disjunction D

Basic principles of deductive logic were laid down by

• Euclid A
• Leibniz B
• Newton C
• Aristotle D

To draw conclusions from some experiments or few contacts only is called:

• Deduction A
• Implication B
• Conjunction C
• Induction D

• hypothesis A
• implication B
• consequent C
• antecedent D

All men are mortal. We are men, therefore, we are also mortal. This is a useful example of

• deduction A
• induction B
• conjunction C
• disjunction D

A conjunction is considered to he true only if both its components are

• false A
• equilvalent B
• equal C
• true D

All men are mortal, We are men, there fore, we are also mortal. This is a useful example of

• Deduction A
• Induction B
• Conjuction C
• disjunction D

A statement which is already false is called

• Tautology A
• Contrapsitive B
• Absurdity C
• Universal quantifiers D

~ p is the

• implication of p A
• disjunction of p B
• negation of p C
• conjuction of p D

10 is a even number or 0 is a natural number, then truth value of this disjunction is

• false A
• true B
• not discussed C
• negation of first D

If both p and q are false, then the disjunction of p and q is

• false A
• true B
• equal C
• equivalent D

We often consult doctors or lawyers on the basis of their good

• personality A
• behaviour B
• reputation C
• good dealing D

If p is false, ~ p is

• true A
• not true B
• equal to p C
• conjuction D

Conjunction of two statements p and q is denoted symbolically as

• 
  A
• 
  B
• 
  C
• 
  D

The disjunction of two statements p and q, is denoted symbolically as

• 
  A
• 
  B
• 
  C
• 
  D

According to Aristotle, in proposition there could be

• one possibilities A
• two possibilities B
• three possibilities C
• seven possibilities D

The greater part of our knowledge, is based on

• deduction A
• induction B
• conjunction C
• disjunction D

The conjunction of 3>5, and 5<9, is

• false A
• true B
• unknown C
• disjunction D

The converse and Inverse are

• Equivalent to each other A
• Opposite to each other B
• Equal to each other C
• Not Equal to each other D

• conclusion A
• consequent B
• hypothesis C
• conditional D

A statement which is already false is called

• Tautology A
• Contrapsitive B
• Absurdity C
• Universal quantifiers D

The symbol∋ stand for

• Such that A
• There exist B
• For all C
• Belongs to D

While writing his books on geometry, Euelid used

• Inductive method A
• Deductive method B
• Implication C
• proposition D

Disjunction of p and q is

• p or q A
• p and q B
• p if q C
• p implies q D

According to Aristotle, in preposition there could be

• One possibility A
• Two possibility B
• three possibility C
• Seven possibilites D

If p is false, -p is

• True A
• Not true B
• Equal to p C
• Conjunction D

Which of the following statement, is true

• Lahore is in Punjab and 5>7 A
• Lahore is the capital of Pakistan and 3<23 B
• Lahore is capital of Sindh and 2+2 = 7 C
• Lahore is the capital of Sindh or 2+2=4 D