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

• Commutative property of addition A
• Closure property of addition B
• Additive inverse C
• Associative property w.r.t. to addition D

O is ______

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

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

If 0 = R, thenthe additive inverse of a is

• 1/9 A
• ^1/-9 B
• a C
• -a D

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

If Z₁ = 1+ i, Z₂ = 2+3i , then |Z₁ -Z₂| =?

• √5 A
• √7 B
• -1-2i C
• √3 D

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 D

The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 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

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

∀x,y,z ∈ R and z 0,then

• x > y ⇒ xz > yz A
• x<y ⇒ xz < yz B
• x < y ⇒ xz > yz C
• None of these D

The sum of complex number (a,b) and (c,d) is

• 
  A
• 
  B
• 
  C
• 
  D

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

• 
  A
• 
  B
• 
  C
• 
  D

Any whole number can be written as a product of factors which are

• Odd numbers A
• Prime number B
• Rational number C
• Even number D

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

The multiplicative inverse of 4 is

• -4 A
• -1/4 B
• 1/4 C
• 1 D

• are real no A
• both are not real B
• are imaginary no C
• both are imaginary D

• 
  A
• 1 B
• -1 C
• 
  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

√2 +√3 +√5) = (√2 +√3 +√5: this property is called

• associative property w.r.t addition A
• commutative property B
• Closure property w.r.t addition C
• Additive identity D

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

4/√49 is a

• Irrational Number A
• Prime Number B
• Rational number C
• Whole number D

A non-terminating, non-recurring decimal represent

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

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

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

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

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is

• Trichotomy property A
• Transitive property B
• Symmetric property C
• Additive property D

Multiplicative inverse of 0 is

• 0 A
• 1 B
• ±1 C
• Does not exist D

• 
  A
• 
  B
• 
  C
• 
  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