ECAT Pre Engineering MCQ Test With Answer for Chapter 4 Mathematics

Addition is not operation on

• Natural numbers A
• Even numbers B
• odd numbers C
• set of integers D

Which of the following represent injuctive function

• 
  A
• 
  B
• 
  C
• 
  D

(a,b) = (c,d) if and only if

• a=b and c =d A
• a = d and b = c B
• a = c and b = d C
• a - b = c -d D

Identity element, if it exists, is

• inverse A
• unique B
• commutative C
• associative D

A semi-group having an identity is called a

• groupoid A
• non-commutative B
• abelian C
• monoid D

(a,b) (c,d) if and only if

• a = b and c =d A
• a = d and b = c B
• a = c and b = d C
• a - b = c - d D

There will be no inverse if the function is

• one -to - one A
• One to many B
• onto C
• into D

The inverse of a line is

• inverse A
• Line B
• quadratic C
• Circle D

The graph of a constant line is

• vertical line A
• parabola B
• circle C
• horizontal line D

The set of first elements of the ordered pairs forming the relation is called is

• Domain A
• Range B
• Ordered paris C
• Relation D

• 
  A
• 
  B
• 
  C
• 
  D

ax+by+c = 0, represent a

• circle A
• parabola B
• straight line C
• quadratic circle D

Which of the following diagrams represent into function?

• 
  A
• 
  B
• 
  C
• 
  D

The group of a constant line is

• Vertical line A
• Parabola B
• Circle C
• Horizontal line D

If no two elements of ordered pairs of a function from A onto B are the same, then it is called

• surjective A
• injuctive B
• bijective C
• on to D

N is closed with respect to ordinary

• addition A
• multiplication B
• addition and multiplication C
• division D

A function from A to B is called on-to function, if its range is

• A A
• B B
• A and B C
• neither A nor B D

The set of first elements of the ordered pairs forming the relation is called its

• domain A
• range B
• ordered paris C
• relation D

If A is non-empty set, any subset of A x A is called a relation in

• A A
• B B
• ∅ C
• r D

A relation A into B in which Domain is not equal to A, is called

• into function A
• onto function B
• None of these C
• surjective D

• similar images A
• distinct images B
• similar range C
• option a and c D

• 
  A
• 
  B
• 
  C
• 
  D

The net of cartesian product AxB consists of

• domain A
• range B
• binary relation C
• ordered pair D

Extraction of square root of a given number is a

• unary operation A
• binary operation B
• group C
• inverse function D

If no two elements of ordered pair of a functions from A into B are equal, then it is called.

• Surjective A
• Injuctive B
• Bijective C
• Onto D

The set {E,0}, is closed under (ordinary)

• multiplication A
• addition B
• subtraction C
• division D

If no two elements of ordered pairs of a function from A onto are the same, then it is called.

• Surjective A
• Injuctive B
• Bijective C
• on to D

Negation of a given number is an example of

• Binary operation A
• group B
• unary operation C
• function D

arb mean

• a is related to b A
• b is related to a B
• a is reciprocal of b C
• a is not related to b D

• injuctive as well as surjective A
• both onto and into B
• one - one and into C
• only (1 - 1) D