ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 3 (Logic)

A daclarative statement which may be true or false but not both is called a

• hypothesis A
• proposition B
• implication C
• conjuction 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

-p is the

• Implication of p A
• disjunction of p B
• negation of p C
• conjunction of p D

Deduction is mostly used in

• elementary mathematics A
• natural science B
• higher mathematics C
• medicine D

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

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

For reasoning, we have to use

• implication A
• conjunction B
• induction C
• proposition D

According to Aristotle, in preposition there could be

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

Deductive logic in which every statement is regarded as true or false and there is no other possibility is called:

• Deductive logic A
• Inductive logic B
• Aristotlian logic C
• Non-Aristotlian logic D

Logic in which there is scope of third or fourth possibility is called.

• non-Aristotlian logic A
• Aristotlian logic B
• Postulates C
• induction logic D

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

The conditional statement "If p then q" is logically equivalent to the statement.

• Not p or Not q A
• Not p and Not q B
• Not p or q C
• p or q D

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

• 
  A
• 
  B
• 
  C
• 
  D

Conjunction of two statements p and q is denoted symbolically as

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following statement, is ture

• 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

If p is false, ~ p is

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

The symbol∋ stand for

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

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

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

To draw conclusions from some expreiments or few contacts only is called

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

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

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

Any conditional and its contrapositive are

• Equilavant A
• Opposite B
• Equal C
• Not Equal D

A statement which is already false is called

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

Basic-principles of deductive logic were laid down by:

• Euelid A
• Leibniz B
• Aristotle C
• Newton 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

Any two propositions which is combined by the word "and" and form a compound proposition is called

• conditional of the original proposition A
• consequent of the original proposition B
• disjunction of the original proposition C
• conjunction of the original propositoin D

An implication of p and q is denoted by

• 
  A
• 
  B
• 
  C
• 
  D

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

• false A
• true B
• equal C
• equivalent 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

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

The greater part of our knowledge, is based on

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

If p is false, -p is

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