ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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

• Additive property in R A
• Multiplication property in R B
• Cancellation property in R C
• Distribution property in R D

• z is purely imaginary A
• a is any complex number B
• z is real C
• None of these D

• 15 A
• 15 i B
• -15 i C
• -15 D

For each real number, there is a number which is its

• Negative A
• Possitive B
• Opposite C
• Similar D

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

What is the conjugate of -7 -2i?

• -7 + 2i A
• 7 + 2i B
• 7 -2i C
• None of these D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

4/√49 is a

• Irrational Number A
• Prime Number B
• Rational number C
• Whole number D

i =

• 
  A
• 
  B
• 
  C
• 
  D

Every irrational number is

• A real number A
• A prime number B
• A natural number C
• An integer D

• Associative property of addition A
• Associative property of multiplication B
• Commutative property of addition C
• Commutative property of multiplication D

a.a^-1 = a^-1.a = 1 is a

• Commutative law of multiplication A
• Multiplicative identity B
• Associative law of multiplication C
• Multiplicative inverse D

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

A subset of set of complex number whose elements are of the form (a,0) is called

• Real number A
• Complex number B
• Rational number C
• Irrational number D

• Set of whole number A
• Rational Numbers B
• Complex numbers C
• Whole numbers D

• (a + b)c = a . c + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b+ c) = ab + ac D

• 
  A
• 
  B
• 
  C
• 
  D

The square root of 2i - 20i is

• +-(5 - 2i) A
• +-(5 + 2i) B
• (5 - 2i) C
• None of these D

• additive property A
• multiplicative property B
• additive inverse C
• additive identity D

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

• 
  A
• 
  B
• 
  C
• 
  D

The value of x, and y, when (x + iy)²= 5 + 4i

• X = 2, y = -1 A
• X = -2, y=1 B
• X = 2, y = -1 C
• X = 2, y = 2 D

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

The set of positive integers, 0 and negative integers is known as the set of

• Natural numbers A
• Rational numbers B
• All integers C
• Irrational numbers D

The multiplicative inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 1 D