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

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

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

• 
  A
• 
  B
• 
  C

If P is a whole number greater than 1, which has only P and I are factors. Then P is called

• Wholw number A
• Prime number B
• Even number C
• Odd number D

The multiplicative inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 1 D

∀x, y ∈ R, either x = y or x > y or x < y is

• Transitive property A
• Reflexive property B
• Trichotomy property C
• None of these D

Zero is

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

Geometrically the modulus of a complex number represents its distance from the

• Point (1,0) A
• Point (0,1) B
• Point (1,1) C
• Point (0,0) D

In (x +iy) y is called as

• Imaginary part A
• Complex number B
• Real part C
• None of above D

The√ is used for the

• Positive square root A
• Negative square root B
• +ve and -ve square root C
• Whole number D

What is the conjugate of -7 -2i?

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

• (x, y) A
• (kx, y) B
• (x, ky) C
• (kx, ky) D

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

Any recurring decimal represents a

• Irrational no A
• Integer B
• Rational no C
• None of these D

• a = a A
• a < a B
• a > a C
• a²= a D

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

Which element is the additive inverse of (a, b) in Complex numbers?

• (a, 0) A
• (0, b) B
• (a, b) C
• (-a, -b) D

• Additive property in R A
• Multiplication property in R B
• Cancellation property in R C
• Distribution property in R D

• N A
• r B
• 2r C
• π D

Gooch crucible is made of :

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

• 
  A
• 
  B
• 
  C
• 
  D

It is not possible to find the exact value of

• π A
• √9 B
• ∛27 C
• √1 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

• 15 A
• 15 i B
• -15 i C
• -15 D

√-1 b=

• b A
• 2 B
• 2b C
• None of these D

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

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

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