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

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  A
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  B
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  C
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  D
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  E

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  A
• 
  B
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  C
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  D

Name the property used in 1000 x 1 = 1000

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

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  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

1.4142135... is ______

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

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

The square roots of negative numbers is called

• Real no A
• Complex no B
• Positive no C
• Negative no D

• N A
• r B
• 2r C
• π D

i is equal

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

• -8 A
• 8 B
• 8i C
• 32 D

In (x + iy), y is called as

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

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

Gooch crucible is made of :

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

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  A
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  B
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  C
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  D

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

If 4 > b or a < b than a = b is a

• Additive property A
• Transitive property B
• Trichotomy property of inequality C
• None of above D

√23 is

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

202.04 is an example of

• Recurring decimals A
• Non-recurring decimals B
• Terminating decimals C
• None of these 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

√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

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

(a-1)-1 =

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

• real number A
• complex number B
• rational number C
• irrational number D

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

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  A
• 
  B
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  C
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  D

If Z = (1,2), then Z^-1= ?

• (0.2, 0.4) A
• (-0.2, 0.4) B
• (0.2, -0.4) C
• (-0.2, -0.4) D

∀a,b, c ε R,a +c = b + c = > a = b

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