ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

• Rational A
• Irrational B
• Natural C
• Odd D

In (x + iy), y is called as

• Imaginary part A
• Complex number B
• Real part C
• None of above D

• Rule of quotient of fraction A
• Golden rule of fraction B
• Rule for product of fraction C
• Principle for equality of fraction D

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D

i² = 

• 1 A
• 2 B
• -1 C
• 0 D

• 
  A
• 
  B
• 
  C
• 
  D

2.333....is a

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

The equation |x + 4| = x has solution

• x = -2 A
• x = 2 B
• x = -4 C
• x = 4 D

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

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

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

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

• N A
• r B
• 2r C
• π D

• 
  A
• 
  B
• 
  C
• 
  D
• 
  E

∀x,y∈R and x> 0 , y>0, if x > y

• 
  A
• 
  B
• 
  C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

In polar form of complex number r =

• 
  A
• 
  B
• 
  C
• 
  D

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D

i =

• 
  A
• 
  B
• 
  C
• 
  D

(a, b) + (-a, -b) =

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

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

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following sets has closure property w.r.t. addition

• { 0 } A
• { 1 } B
• { 0, -1} C
• { 1, -1} D

• a = a A
• a < a B
• a > a C
• a²= a 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

Any recurring decimal represents a

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

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

• 
  A
• 
  B
• 
  C
• 
  D

A prime number can be a factor of a square only if it occurs in the square at least

• Once A
• Thirce B
• Twice C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D