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

6 is

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

• 1 A
• -i B
• i C
• 0 D

∀ z ∈ C, multipliucative is

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

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 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

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b D

• z is purely imaginary A
• a is any complex number B
• z is real C
• None of these D

i² =

• 1 A
• 2 B
• -1 C
• 0 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

The equation |x +4| = x has solution

• x = -2 A
• x = 2 B
• x = -4 C
• x = 4 D

• Set of whole number A
• Rational Numbers B
• Complex numbers C
• Whole numbers D

Every recurring decimal represents

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

QUQ, =

• N A
• R B
• W C
• Z D

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

The decimal fraction in which we have finite number of digits in its decimal part is called.

• recurring decimal fraction A
• Non terminating faction B
• Non recurring fraction C
• terminating decimal fraction D

What is the conjugate of -6 -i

• -6 +i A
• 6 + i B
• -6 -i C
• 6 -i D

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

A prime number can be a factor of a square only if it occurs in the square at least

• Once A
• Thirce B
• Twice C
• None of these D

Name the property used in 1000 x 1 = 1000

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

If z=(x,y) then z has no multiplicative inverse when

• x ≠ 0, y = 0 A
• x = 0, y = 0 B
• x = 0, y ≠ 0 C
• None of these D

√25 is a number

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

6 is

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

• 
  A
• 
  B
• 
  C
• 
  D

3/2 is

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

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

In R, the multiplicative identity is

• 0 A
• 1 B
• -1 C
• None D

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following sets has closure property w.r.t. addition

• { 0 } A
• { 1 } B
• { 0, -1} C
• { 1, -1} D