ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 1 (Number System)

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

1/3 is a decimal

• Recurring A
• Terminating B
• Non-terminating C
• None of the above D

i =

• √1 A
• √2 B
• √-2 C
• √-1 D

• Associative law of multiplication A
• Commutative law of addition B
• Commutative law of multiplication C
• Associative law of addition D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

Every natural number is

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

Gooch crucible is made of :

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

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

0.25 is ______

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

• N A
• r B
• 2r C
• π D

Decimal part of irrational number is

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

(7, 9) + (3, -5) =

• (4, 4) A
• (10, 4) B
• (9, -5) C
• (7, 3) 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

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 D

Multiplicative inverse of 0 is

• 0 A
• 1 B
• ±1 C
• Does not exist D

202.04 is an example of

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

• 0 A
• 1 B
• -1 C
• None of these D

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

• 
  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse of 4 is

• -4 A
• -1/4 B
• 1/4 C
• 1 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

24 can be written as a product of

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

If z=(x,y) then z has no multiplicative inverse when

• x ≠ 0, y = 0 A
• x = 0, y = 0 B
• x = 0, y ≠ 0 C
• None of these D

3/4 is ______

• An odd number A
• An even number B
• A natural number C
• A rational number D

1/3 is ______

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

i =

• 
  A
• 
  B
• 
  C
• 
  D

• Associative property of addition A
• Associative property of multiplication B
• Commutative property of addition C
• Commutative property of multiplication D

(7,9) +(3,-5) =

• (4,4) A
• (10,4) B
• (9,-5) C
• (7,3) D

• 
  A
• 
  B
• 
  C
• 
  D