ECAT Pre General Science MCQ Test With Answer for Mathematics Chapter 1

Every whole number is

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

If a and b are real numbers then a+b is also real number this law is called

• associative law of addition A
• closure law of addition B
• Distributive law of addition C
• Commutative law of addition D

Name the property used in 4 x (5 x 8) = ( 4 x 5) x 8

• Associative property of addition A
• Associative property of multiplication B
• Additive identity C
• Multiplicative identity D

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

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

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

• 15 A
• 15 i B
• -15 i C
• -15 D

√2 is a number

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

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

• 
  A
• 
  B
• 
  C
• 
  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

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

The set of natural no. is closed under

• multiplication A
• subtraction B
• difference C
• division D

π is ______

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

• 
  A
• 
  B
• 
  C
• 
  D

• 0 A
• 1 B
• -1 C
• None of these D

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

• Trichotomy property A
• Additive property of inequality B
• Transitive property C
• Multiplicative property D

Which element is the additive inverse of (a,b) in Complex numbers

• (a,0) A
• (0,b) B
• (a,b) C
• (-a,-b) D

The product of complex numbers (a,b) and (c,d) is

• (ac, bd) A
• (ac-bd, ad+bc) B
• (ab,cd) C
• (ac+bd,ad-bc) D

In (x + iy), y is called as

• Imaginary part A
• Complex number B
• Real part C
• None of above D

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

Geometrically, the modulus of a complex number represents its distance from the

• Point (1, 0) A
• Point (0, 1) B
• Point (1, 1) C
• Point (0, 0) D

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

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

• 
  A
• 
  B
• 
  C
• 
  D

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

• 
  A
• 
  B
• 
  C
• 
  D
• 
  E