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

6 is

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

14 is not a

• Prime number A
• Whole number B
• Even number C
• Real number D

• 
  A
• 
  B
• 
  C
• 
  D

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

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

QUQ, =

• N A
• R B
• W C
• Z D

0 (zero) is

• An irrational number A
• A rational number B
• A negative integer C
• A positive number D

The square root of 2i - 20i is

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

• 
  A
• 
  B
• 
  C
• 
  D

π is ______

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

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

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

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

• One A
• Two B
• Three C
• Four D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

O is ______

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

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

√25 is a number

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

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D

What is the conjugate of -7 -2i?

• -7 + 2i A
• 7 + 2i B
• 7 -2i C
• None of these D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is

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

If z₁ =√-36 ,z₂ =√-25,z3 =√-16 then

• 15 A
• 15i B
• -15i C
• -15 D

∀a,b,c∈R and c>0,then

• a>b ⇒ ac < bc A
• a>b ⇒ ac > bc B
• a<b ⇒ ac > bc C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D

4/√49 is a

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

The equation |x +4| = x has solution

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

√23 is

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

a >b ⇒a +c >b +c is known as

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