ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

∀ a ε R ∃ o ε R such that a + v = 0 + a = a is property of

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

• 
  A
• 
  B
• 
  C
• 
  D

• real part of z A
• imaginary part of z B
• conjugate of z C
• modulus of z D

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

The equation |x + 4| = x has solution

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

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

∀ z ∈ C, multipliucative is

• (1,1) A
• (1,0) B
• (0,1) C
• None of these D

∀a,b ε R, ab = be is a

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

1.4142135... is ______

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

Any recurring decimal represents a

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

• x A
• 
  B
• y C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D
• 
  E

If A = {x / x ∈ R ∧ x² - 16 = 0} then A =

• - x A
• Infinite set B
• Φ C
• {-4,4} D

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

Multiplicative inverse of 0 is

• 0 A
• 1 B
• ±1 C
• Does not exist 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

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

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

√23 is

• A rational number A
• A irrational number B
• An even integer C
• A factor of 36 D

Union of the sets of rational and irrational numbers is called 6th set of

• Natural numbers A
• Real numbers B
• Whole numbers C
• Prime numbers D

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

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

0 (zero) is

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

• Associate law of addition A
• Commutative law of addition B
• Additive identity C
• Closure law of addition 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

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

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