ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 1 (Number System)

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

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

QUQ, =

• N A
• R B
• W C
• Z D

• 
  A
• 
  B
• 
  C
• 
  D

Some of two real numbers is also a real number , this property is called:

• Commutative property w.r.t addition A
• Closure property w.r.t. addition B
• Associative property w.r.t. addition C
• Distributive property w.r.t addition D

If in a set of real no a is multiplicative identity then

• a,a = a² A
• a,a = 1 B
• a,a = 0 C
• None of these D

In polar form of complex number r =

• 
  A
• 
  B
• 
  C
• 
  D

If a > b or a < b than a = b is a

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

O is ______

• A positive integer A
• A negative integer B
• A natural number C
• An integer D

What is the conjugate of -6 -i

• -6 +i A
• 6 + i B
• -6 -i C
• 6 -i D

In set builder notation the set {0,1,2,........100} can be written as

• {x / xε B ∧ x ≤ 100} A
• {x / x ∈ W ∧ x < 101} B
• {x / x ∈ Z ∧ x < 101} C
• The set of first 100 whole numbers D

In R the right cancellation property w.r.t. addition is

• 
  A
• 
  B
• 
  C
• 
  D

(√3+√5)+√7 = √3 +(√5 +√7) property used in above is

• Commutative property of addition A
• Closure property of addition B
• Additive inverse C
• Associative property w.r.t to adition D

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

Every recurring decimal represents

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

Any recurring decimal represents a

• Irrational no A
• Integer B
• Rational no C
• None of these D

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

i² = 

• 1 A
• 2 B
• -1 C
• 0 D

• A prime number A
• An integer B
• A whole number C
• An irrational number D

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 D

Every natural number is

• A prime number A
• An irrational number B
• An integer C
• An even number D

i⁹ =

• i² A
• -1 B
• 1 C
• i D

0 (zero) is

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

Geometrically the modulus of a complex number represents its distance from the

• Point (1,0) A
• Point (0,1) B
• Point (1,1) C
• Point (0,0) D

i^-(4n+2) = -------------------------------

• 1 A
• i B
• -1 C
• -i D

• 
  A
• 
  B
• 
  C
• 
  D

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

• 
  A
• 
  B
• 
  C
• 
  D

i is equal

• (1 , 0) A
• (0 , 1) B
• (1 , 1) C
• (0 , 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