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

Basic-principles of deductive logic were laid down by:

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

~ p is the

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

If p is false, -p is

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

The greater part of our knowledge, is based on

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

According to Aristotle, in preposition there could be

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

Deduction is mostly used in

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

Basic principles of deductive logic were laid down by

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

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

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

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

• False A
• Equivalent 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

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

• false A
• true B
• equal C
• equivalent 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

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

• False A
• True B
• Disjunction C
• Unknown D

If p is false, ~ p is

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

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

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

The symbol ∃ stand for

• Such that A
• This implies that B
• For all C
• There exist D

The statements of the form "If p then q" are called

• hypothesis A
• conditional B
• disjunction C
• conjunction 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

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

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

The symbol∋ stand for

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

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

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

For reasoning, we have to use

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

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

• Hypothesis A
• Proposition B
• implication C
• conjunction 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

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

• hypothesis A
• proposition B
• implication C
• conjuction D

The greater part of our knowledge,is based on

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

Any conditional and its contrapositive are

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