ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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

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

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

O is ______

• A positive integer A
• A negative integer B
• A natural number C
• An integer D

Some of two real numbers is also a real number , this property is called:

• Commutative property w.r.t addition A
• Closure property w.r.t. addition B
• Associative property w.r.t. addition C
• Distributive property w.r.t addition D

A prime number can be a factor of a square only if it occurs in the square at least

• Once A
• Thirce B
• Twice C
• None of these D

1.4142135... is ______

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

• 
  A
• 
  B
• 
  C

• 0 A
• 1 B
• -1 C
• None of these 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

What is the conjugate of -6 -i

• -6 +i A
• 6 + i B
• -6 -i C
• 6 -i D

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

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

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

• Reflexive property A
• Symmetric property B
• Cancellations property w.r.t. addition C
• Transitive property D

In polar form of complex number r =

• 
  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

Name the property used in 1000 x 1 = 1000

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

√x = ______ if is a prime number

• Rational no A
• Natural no B
• Irrational no C
• Complex no D

Multiplicative inverse of "1" is

• 0 A
• ±1 B
• 1 C
• {0,1} D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 D

• 
  A
• 
  B
• 
  C
• 
  D

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

The equation |x + 4| = x has solution

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

There is no element common in

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  
  
  A
• 
  B
• 
  C
• 
  D

In set builder notation the set {0,1,2,........100} can be written as

• {x / xε B ∧ x ≤ 100} A
• {x / x ∈ W ∧ x < 101} B
• {x / x ∈ Z ∧ x < 101} C
• The set of first 100 whole numbers D

Name the property used in a (b-c) = ab - ac

• commutative property of multiplication A
• distributive property of multiplication B
• associative property of multiplication C
• multiplicative inverse D

QUQ, =

• N A
• R B
• W C
• Z D