ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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  A
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  B
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  C
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  D

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

2.333....is a

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

0 (zero) is

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

• Associative property of addition A
• Commutative property of addition B
• Distributive property C
• Additive identity D

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

• One A
• Two B
• Three C
• Four 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

Rational number is a number which can be written as a terminating decimal fraction or a

• Non-terminating decimal fraction A
• Non-recurring B
• Recurring decimal fraction C
• a, b and 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

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

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

• √5 A
• √7 B
• -1-2i C
• √3 D

• Principle of equality of fractions A
• Rule for product of fraction B
• Rule for quotient of fraction C

• Principle of equality of fractions A
• Rule for product of fractions B
• Golden rule for fractions C
• Rule for quotient of fractions D

1.4142135... is ______

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

The order axioms are satisfied by set of

• C A
• C and R B
• R C
• None of these D

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

• √3 i A
• √7 B
• -2-i C
• √5 D

0.25 is ______

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

a >b ⇒a +c >b +c is known as

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

i³ =

• -1 A
• i B
• -i C
• 1 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

6 is

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

The square root of 2i - 20i is

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

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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

• A prime number A
• An integer B
• A whole number C
• An irrational number D

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

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

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

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  A
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  B
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  C
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  D