ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

a >b ⇒a +c >b +c is known as

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

The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 D

3.5+5.4=5.4+3.5 =8.9 this property of addition is called

• additive identity A
• assoclative property B
• commulative property C
• closure property D

• 
  A
• 
  B
• 
  C
• 
  D

24 can be written as a product of

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

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

In R the number of identity element w.r.t '+' is

• One A
• Two B
• Three C
• Four D

The conjugate of √5 i is

• √5 A
• -√5 i B
• i C
• 5i D

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

Every real number is

• a positive integer A
• a rational number B
• a negative integer C
• a complex 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

The value of x, and y, when (x + iy)²= 5 + 4i

• X = 2, y = -1 A
• X = -2, y=1 B
• X = 2, y = -1 C
• X = 2, y = 2 D

The square root of 2i - 20i is

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

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

The square root of every incomplete square is an

• Rational numbers A
• Even numbers B
• odd numbers C
• Irrational numbers D

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

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

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

(a-1)-1 =

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

The identity element with respect to subtraction is

• 0 A
• -1 B
• 0 and 1 C
• None of thes D

If ∀a,b ε R,then a +b  ε  R is a property

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

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

If a > b or a < b than a = b is a

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

• -8 A
• 8 B
• 8i C
• 32 D

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

The order axioms are satisfied by set of

• C A
• C and R B
• R C
• None of these D

• 15 A
• 15 i B
• -15 i C
• -15 D

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

Such fraction which can not be written in the form ofp⁄q where p,q and q≠ 0,such fractions are called.

• Fractinal numbers A
• Rational Numbers B
• Even Numbers C
• Whole Numbers D