ECAT Pre General Science MCQ Test With Answer for Mathematics Chapter 1

• 0 A
• 1 B
• -1 C
• None of these D

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

• 15 A
• 15 i B
• -15 i C
• -15 D

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

The set {1,2,3,4......} is called

• Set of natural numbers A
• Set of whole numbers B
• Set of rational number C
• Set of irrational numbers D

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

• 
  A
• 
  B
• 
  C
• 
  D

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

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

1/3 is ______

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

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

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

• 
  A
• 
  B
• 
  C
• 
  D

Name the property used in 4.1 + (-4.1) = 0

• Additive inverse A
• Multiplication inverse B
• Additive identity C
• Multiplication identity D

0 (zero) is

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

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

• 
  A
• 
  B
• 
  C
• 
  D

Multiplicative inverse of 0 is

• 0 A
• 1 B
• ±1 C
• Does not exist D

√2 is a number

• Rational A
• Irrational B
• Even C
• Odd 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

In R the left cancellation property w.r.t addition is

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

∀x,y∈ R and x < 0, y < 0, which one is true 

• xy < o A
• xy = o B
• xy > o C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

The real number system contains.

• Positive Numbers A
• Negative numbers B
• Zero C
• (option a, b and c) D

There is no element common in

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

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

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

√23 is

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

If z₁ = (a,b), z₂=(c,d), then z₁ z₂ = -------------------

• (ac,bd) A
• (ac+bd, ad-bc) B
• (ac-bd , ad+bc) C
• (ac-bd , ad-bc) D

• N A
• r B
• 2r C
• π D