ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

The set {1,2,3,4......} is called

• Set of natural numbers A
• Set of whole numbers B
• Set of rational number C
• Set of irrational numbers D

• are real no A
• both are not real B
• are imaginary no C
• both are imaginary D

i³=

• -1 A
• i B
• -i C
• 1 D

• 0 A
• 1 B
• -1 C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

• -3 -2i A
• 3 +2i B
• 1 + 2i C
• 1 - 2i D

A non-terminating, non-recurring decimal represent

• A natural number A
• A rational number B
• An irrational number C
• A prime number D

• A complex number A
• A rational number B
• A natural number C
• An irrational number D

Every recurring decimal represents

• A natural number A
• A rational number B
• An irrational number C
• A whole number D

π is ______

• A complex number A
• A rational number B
• A natural number C
• An irrational number D

• Associative property of addition A
• Commutative property of addition B
• Distributive property C
• Additive identity D

The decimal fraction in which we have finite number of digits in its decimal part is called.

• recurring decimal fraction A
• Non terminating faction B
• Non recurring fraction C
• terminating decimal fraction D

• (x, y) A
• (kx, y) B
• (x, ky) C
• (kx, ky) D

• 
  A
• 
  B
• 
  C
• 
  D

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

• Closure law of addition A
• Associative law of addition B
• Additive inverse C
• Additive identity D

The set of natural no. is closed under

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

• 
  A
• 
  B
• 
  C
• 
  D

Which element is the additive inverse of (a, b) in Complex numbers?

• (a, 0) A
• (0, b) B
• (a, b) C
• (-a, -b) D

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

The square roots of negative numbers is called

• Real no A
• Complex no B
• Positive no C
• Negative no D

∀x,y,z ∈ R and z 0,then

• x > y ⇒ xz > yz A
• x<y ⇒ xz < yz B
• x < y ⇒ xz > yz C
• None of these D

• Multiplication property A
• Additive property B
• Trichotomy property C
• Transitive property of inequality D

If a is any real number and a = a is called

• symmetric property A
• Trichotomy Properties B
• Transitive Property C
• Reflexive Properties D

Zero is

• An irrational number A
• A rational number B
• A negative integer C
• A positive number D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

If Z = (1,2), then Z^-1 =?

• (0.2, 0.4) A
• (-0.2 ,0.4) B
• (0.2,-0.4) C
• (-0.2,-0.4) D

• 
  A
• 
  B
• 
  C
• 
  D

1.4142135... is ______

• A natural number A
• A rational number B
• A prime number C
• An irrational number D

The property used in -3 <-2 ⇒0 <1

• Commutative property A
• Additive property of inequality B
• Additive inverse C
• Additive identity D