ECAT Pre Engineering Mathematic MCQ Test With Answer for Chapter 1 (Number System)

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

√25 is a number

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

• 
  A
• 
  B
• 
  C
• 
  D

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

The set of rationals numbers between 0 and I is

• Finite A
• Null set B
• Infinite C
• None of these D

1.4142135... is ______

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

• N A
• r B
• 2r C
• π D

• 
  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

Name the property used in 4.1 + (-4.1) = 0

• Additive inverse A
• Multiplication inverse B
• Additive identity C
• Multiplication identity D

• 
  A
• 
  B
• 
  C
• 
  D

√23 is

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

Every whole number is

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

The order axioms are satisfied by set of

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

∀a,b, c ε R ac = bc ⇒ a = b, c ≠ 0 is a

• Symmetric property A
• Cancellation property w.r.t multiplication B
• Reflexive property C
• Transitive property D

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

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

• 
  A
• 
  B
• 
  C
• 
  D

i =

• 
  A
• 
  B
• 
  C
• 
  D

If z₁ =√-36 ,z₂ =√-25,z3 =√-16 then

• 15 A
• 15i B
• -15i C
• -15 D

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

• Closure law of addition A
• Associative law of addition B
• Additive inverse C
• Additive identity D

• 0 A
• 1 B
• -1 C
• 2 D

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

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

If 0 = R, thenthe additive inverse of a is

• 1/9 A
• ^1/-9 B
• a C
• -a D

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