First Year Mathematics Chapter 1 Online MCQ Test for 1st Year Mathematics Chapter 1 Number Systems Preparation

• rationalnumber A
• irrationalnumber B
• naturalnumber C
• wholenumber D

The multiplicative identity of real numbers is:

• 0 A
• 1 B
• 2 C
• -1 D

Rational numbers are:

• repeating decimals A
• terminatingdecimals B
• periodicdecimals C
• all of these D

Modulus of 15 i + 20 is:

• 20 A
• 15 B
• 25 C
• none of the above D

• i A
• 0 B
• 
  C
• 
  D

Division of a natural number by another natural number gives:

• always a natural number A
• always an integer B
• always a rationalnumber C
• always an irrational number D

• 
  A
• 
  B
• 
  C
• 
  D

The ordered pairs (2, 5) and (5, 2) are:

• not equal A
• equal B
• disjoint C
• empty D

• cancellation property w.r.t multiplication A
• cancellationproperty w.r.t addition B
• multiplicativeproperty C
• additiveproperty D

If z = x + i y = r (cos Θ + i sin Θ), then arg z is:

• tan Θ A
• cos²Θ + sin²Θ B
• r C
• Θ D

The real part of the complex number a + bi is:

• b A
• -b B
• a C
• -a D

• x = 0 A
• y = 0 B
• x = 0 and y = 0 C
• x = 0 or y = 0 D

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

The multiplicative invers of a non-zero real number a is:

• 0 A
• -a B
• a C
• 
  D

• 
  A
• x = 0, y = 0 B
• 
  C
• 
  D

Conjugate of complex number (-a, -b) is:

• (-a, b) A
• (-a, -b) B
• (a, -b) C
• none of these D

• 
  A
• archimedean property B
• transitive property C
• multiplicative property D

• closureproperty A
• associativeproperty B
• commutativeproperty C
• trichotomyproperty D

π, e are:

• integers A
• natural numbers B
• rationalnumbers C
• irrationalnumbers D

The imaginary part of the complex number a + bi is:

• a A
• b B
• bi C
• none of these D