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

• 15 A
• 15 i B
• -15 i C
• -15 D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

The set of rationals numbers between 0 and I is

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

• 
  A
• 
  B
• 
  C
• 
  D

• 0 A
• 1 B
• -1 C
• None of these D

1.4142135... is ______

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

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

14 is not a

• Prime number A
• Whole number B
• Even number C
• Real number D

• 
  A
• 
  B
• 
  C
• 
  D

Every recurring decimal represents

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

• 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-1)-1 =

• a-1 A
• a B
• -a C
• None of above D

• 
  A
• 
  B
• 
  C
• 
  D

A subset of set of complex number whose elements are of the form (a,0) is called

• Real number A
• Complex number B
• Rational number C
• Irrational number D

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

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

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

• -3 -2i A
• 3 +2i B
• 1 + 2i C
• 1 - 2i D

• 
  A
• 
  B
• 
  C
• 
  D

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

2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called

• Associative property A
• Identity property B
• Commutative property C
• Closure property w.r.t multiplication D

• a = a A
• a < a B
• a > a C
• a²= a D

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

• 1 A
• -1 B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• None of these D

(a^-1)^-1=

• a^-1 A
• a B
• -a C
• None of above D

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

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

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