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

Decimal part of irrational number is

• Terminating A
• Repeating only B
• Neither repeating nor terminating C
• Repeating and terminating D

• x A
• 
  B
• y C
• 
  D

• real number A
• complex number B
• rational number C
• irrational number D

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

Zero is

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

The equation |x + 4| = x has solution

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

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

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

6 is

• A prime integar A
• An irrational number B
• A rational number C
• An odd integer D

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

I is not

• Real number A
• Natural number B
• Prime Number C
• Whole Number 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

a >b ⇒a +c >b +c is known as

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

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

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

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D

• 
  A
• 
  B
• 
  C
• 
  D

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

• 
  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

• 1 A
• -i B
• i C
• 0 D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  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

• 
  A
• 
  B
• 
  C
• 
  D

• Additive property of inequality A
• Commutative property B
• Additive inverse C
• Additive identity D

The square root of 2i - 20i is

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

There is no element common in

• N and W A
• E and W B
• N and O C
• Q and Q' 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 {0,-1} hold closure property under

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