ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

• 15 A
• 15 i B
• -15 i C
• -15 D

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

3/4 is ______

• An odd number A
• An even number B
• A natural number C
• A rational number D

3.5+5.4=5.4+3.5 =8.9 this property of addition is called

• additive identity A
• assoclative property B
• commulative property C
• closure property D

If z₁= 2 + 6i and z₂= 3 + 7i, then which expression defines the product of z₁and z₂?

• 36 + (-32)i A
• -36 + 32i B
• 6 + (-11)1 C
• 0, +(-12)i D

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

The set {0,-1} hold closure property under

• Addition A
• Both a & c B
• Multiplication C
• None of these D

In (x + iy) x is the known as

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

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

Every irrational number is

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

π is ______

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

∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is

• Trichotomy property A
• Transitive property B
• Symmetric property C
• Additive property D

√-1 b=

• b A
• 2 B
• 2b C
• None of these D

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

√11 is

• an irrational number A
• Rational number B
• odd number C
• Negative number D

• Closure law of addition A
• Closure law of multiplication B
• Commutative law of addition C
• Commutative law of multiplication D

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 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

• 
  A
• 
  B
• 
  C
• 
  D

• 1 A
• -1 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

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 sum of complex number (a,b) and (c,d) is

• 
  A
• 
  B
• 
  C
• 
  D

The identity element with respect to subtraction is

• 0 A
• -1 B
• 0 and 1 C
• None of thes D

• 
  A
• 
  B
• 
  C
• 
  D
• 
  E

There is no element common in

• N and W A
• E and W B
• N and O C
• Q and Q' D

√2 +√3 +√5) = (√2 +√3 +√5: this property is called

• associative property w.r.t addition A
• commutative property B
• Closure property w.r.t addition C
• Additive identity D

• 
  A
• 1 B
• -1 C
• 
  D

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