1st Year Maths Chapter 1 Number System MCQs with Answers

Here you will find 1st Year Maths Chapter 1 Number System MCQs with Answers online for the Entry Test preparation. This chapter is about the Number system in which you will study the types of number system. Natural Numbers, Whole Numbers, Odd, Even, Rational, Irrational, Prime Numbers are the different types of number. The detailed study about the complex numbers is discussed in this chapter. They have different properties and forms. So, this is the brief introduction of this chapter. Every year, the entry test is taken for admissions in different Universities. For this, the students who have passed Intermediate with Maths subject applies for the relevant university and programs. For the admissions, the universities conduct an entry test. The syllabus is included from the text books of the relevant subjects. ECAT is the engineering test and about 30% MCQs are included from Mathematics. Similarly, the entry test like NTS, NET, PU Entry Test, and others have a good weightage of Mathematics portion. So, if you want to prepare for the test, scroll down and get the important MCQs.

1st Year Maths Chapter 1 Number System MCQs with Answers

Question#1. If ‘a’ and ‘b’ are real numbers then a + b is a real number. This law is called:

• Closure law
• Associative law
• Commutative law
• Distributive law

Question#2. {1,-1} is closed with respect to;

• Addition
• Division
• Multiplication
• Both b & c

Question#3. 2sin30⁰ cos30⁰ is

• Irrational
• Integer
• Recurring decimal
• Rational

Question#4. 1 > -l → -3 > -5 , this property is called

• Transitive property
• Additive property
• Closure property
• Multiplicative property

Question#5: The multiplicative inverse of 1-3i is:

• 3i
• 1/3i
• -1/3
• None of these

Question#6: If z₁=(1,0), z­­­₂=(2,3) then z₁/z₂=?

• -2+3i
• 2-3i
• 2+3i
• -2-3i

Question#7: The argument of (0, 2) is:

• π/2
• 3π/2
• – π/4
• π

Question#8: a+b is the square of modulus of:

• z=a+b
• z=(a, b)
• z= (-√a, -√b)
• z=(-a,b)

Question#.9: The modulus of the complex number 1+ i tanα=?

• 1
• tanα
• secα
• cosec α

Question#.10: The set of real number R is closed under the operation of:

• Addition
• Multiplication
• Subtraction
• All of these

Question#.11: Trichotomy property does not hold in the set of:

• Integers
• Rational Numbers
• Real numbers
• Complex numbers

Question#.12: Modulus of (1-cosθ)+isinθ is:

• 1-cosθ
• 2=2cosθ
• 2cosθ/2
• 2sinθ/2

Question#.13: (sinθ + icosθ)⁴=?

• sin4θ + icos4θ
• sin4θ – icos4θ
• cos4θ + isin4θ
• cos4θ – isin4θ

Question#14: If z= 2/2-I + 3/2+i, then Re(z) + Im(z)=?

• 2-1/5 i
• -9/5
• 9
• 9/5

Question#.15: If z₁= a+bi, z­₂­= c+di and z₁+z₂ is real then which one is true?

• b=d
• a=-c
• b=-d
• a=c