ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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  D

Zero is

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

• 15 A
• 15 i B
• -15 i C
• -15 D

The set of positive integers, 0 and negative integers is known as the set of

• Natural numbers A
• Rational numbers B
• All integers C
• Irrational numbers D

In (x + iy) x is the known as

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

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

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

i =

• √1 A
• √2 B
• √-2 C
• √-1 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

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

• One A
• Two B
• Three C
• Four D

A non-terminating, non-recurring decimal represent

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

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

∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is

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

√x = ______ if is a prime number

• Rational no A
• Natural no B
• Irrational no C
• Complex no D

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

√11 is

• an irrational number A
• Rational number B
• odd number C
• Negative number D

Multiplicative inverse of "1" is

• 0 A
• ±1 B
• 1 C
• {0,1} D

The negative square root of 9 can be written as:

• -√9 A
• √9 B
• √18 C
• -√18 D

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

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  C
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  D

The polar form of complex number x ≠ I y =

• r cos θ+ r sin θ A
• r cos θ+ is sin θ B
• cos θ+ r sin θ C
• i cos θ+ i sin θ D

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  D

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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,0) x (c,0) =

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

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  B
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  C
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  D

• Associative law of addition A
• Commutative law of addition B
• Additive identity C
• Closure law of addition 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

If z₁ =√-36 ,z₂ =√-25,z3 =√-16 then

• 15 A
• 15i B
• -15i C
• -15 D

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  B
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  C
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  D