ECAT Pre Engineering MCQ Test With Answer for Chapter 1 Mathematics

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

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

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

∀ z ∈ C, multipliucative is

• (1,1) A
• (1,0) B
• (0,1) C
• None of these D

The property used in -3 <-2 ⇒0 <1

• Commutative property A
• Additive property of inequality B
• Additive inverse C
• Additive identity D

The conjugate of √5 i is

• √5 A
• -√5 i B
• i C
• 5i D

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

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

Any recurring decimal represents a

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

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 D

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

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

The set of natural no. is closed under

• multiplication A
• subtraction B
• difference C
• division D

• 0 A
• 1 B
• -1 C
• 2 D

• Principle of equality of Fractions A
• Rule for product of fraction B
• Golden rule of fraction C
• Rule of quotient of Fraction D

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

• 
  A
• 
  B
• 
  C
• 
  D

If z₁= 2 + 6i and z₂= 3 + 7i, then which expression defines the product of z₁and z₂?

• 36 + (-32)i A
• -36 + 32i B
• 6 + (-11)1 C
• 0, +(-12)i D

Multiplicative inverse of "1" is

• 0 A
• ±1 B
• 1 C
• {0,1} D

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

QUQ, =

• N A
• R B
• W C
• Z D

The multiplicative inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

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

• 
  A
• 
  B
• 
  C
• 
  D
• 
  E

• 
  A
• 
  B
• 
  C
• 
  D

Every whole number is

• A real number A
• An irrational number B
• A prime number C
• A negative integer D

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D