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

i² =

• 1 A
• 2 B
• -1 C
• 0 D

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

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

The multiplicative inverse of 4 is

• -4 A
• -1/4 B
• 1/4 C
• 1 D

Every recurring decimal represents

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

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

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

Every real number is

• A complex number A
• A rational number B
• A natural number C
• A prime number 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

(a-1)-1 =

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

(a,b) +(-a,-b) =

• (0,0) A
• (a,b) B
• (-a,-b) C
• (1,1) D

What is the conjugate of -7 -2i ?

• -7 + 2i A
• 7 +2i B
• 7 -2i C
• √53 D

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D

In polar form of complex number r =

• 
  A
• 
  B
• 
  C
• 
  D

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

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

If a and b are real numbers then a+b is also real number this law is called

• associative law of addition A
• closure law of addition B
• Distributive law of addition C
• Commutative law of addition D

Gooch crucible is made of :

• Brass. A
• Porcelain. B
• Bronze. C
• Gold. D

• 
  
  
  A
• 
  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

• 
  A
• 
  B
• 
  C
• 
  D

• Associative property of addition A
• Commutative property of addition B
• Distributive property C
• Additive identity D

The multiplicative inverse of (a,b) is

• 
  A
• 
  B
• 
  C
• 
  D

π is ______

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

If in a set of real no a is multiplicative identity then

• a,a = a² A
• a,a = 1 B
• a,a = 0 C
• None of these D

√23 is

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

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

√11 is

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

If z₁ = 1 + 2i, z₂ = 3 + 4i then

• z₁ > z₂ A
• z₁ = z₂ B
• z₁ < z₂ C
• None of these D

A non-terminating, non-recurring decimal represent

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

The square root of 2i - 20i is

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