ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

• 
  A
• 
  B
• 
  C
• 
  D

(√3+√5)+√7 = √3 +(√5 +√7) property used in above is

• Commutative property of addition A
• Closure property of addition B
• Additive inverse C
• Associative property w.r.t to adition D

Associative law of multiplication

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

202.04 is an example of

• Recurring decimals A
• Non-recurring decimals B
• Terminating decimals C
• None of these D

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

Every natural number is

• A prime number A
• An irrational number B
• An integer C
• An even number D

(a,0) x (c,0) =

• (0,ac) A
• (ac,0) B
• (0,0) C
• (a,c) D

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

(a^-1)^-1=

• a^-1 A
• a B
• -a C
• None of above D

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

• 
  A
• 1 B
• -1 C
• 
  D

∀ z ∈ C, multipliucative is

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called

• Associative property A
• Identity property B
• Commutative property C
• Closure property w.r.t multiplication D

Any recurring decimal represents a

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

6 is

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

QUQ, =

• N A
• R B
• W C
• Z D

• 15 A
• 15 i B
• -15 i C
• -15 D

The equation |x + 4| = x has solution

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

∀ 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

i² =

• 1 A
• 2 B
• -1 C
• 0 D

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

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

1.4142135... is ______

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

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

24 can be written as a product of

• Odd factors A
• Even factors B
• Whole factors C
• Prime factors D

• 
  A
• 
  B
• 
  C
• 
  D