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

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

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

The identity element with respect to subtraction is

• 0 A
• 1 B
• -1 C
• Does not exist D

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

If z₁= 2 + 6i and z₂= 3 + 7i, then which expression defines the product of z₁and z₂?

• 36 + (-32)i A
• -36 + 32i B
• 6 + (-11)1 C
• 0, +(-12)i D

• 
  A
• 
  B
• 
  C
• 
  D

202.04 is an example of

• Recurring decimals A
• Non-recurring decimals B
• Terminating decimals C
• None of above D

The value of i⁴ⁿ⁺¹

• 1 A
• -1 B
• i C
• i² D

• (x, y) A
• (kx, y) B
• (x, ky) C
• (kx, ky) D

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

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

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

The set {1, 2, 3, 4, ....} is called

• Set of Natural numbers A
• Set of whole numbers B
• Set of rational number C
• Set of irrational numbers D

• Commutative property of addition A
• Closure property of addition B
• Additive inverse C
• Associative property w.r.t. to addition D

If ∀a,b ε R,then a +b  ε  R is a property

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

(a,0) x (c,0) =

• (0,ac) A
• (ac,0) B
• (0,0) C
• (a,c) D

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

1/3 is a decimal

• Recurring A
• Terminating B
• Non-terminating C
• None of the above D

In R the left cancellation property w.r.t addition is

• 
  A
• 
  B
• 
  C
• 
  D

a >b, b >c ⇒a >c is a

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

• 
  A
• 
  B
• 
  C
• 
  D

• Principle of equality of fractions A
• Rule for product of fractions B
• Golden rule for fractions C
• Rule for quotient of fractions D

In R the right cancellation property w.r.t. addition is

• 
  A
• 
  B
• 
  C
• 
  D

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

• Principle of equality of fractions A
• Rule for product of fraction B
• Rule for quotient of fraction C

The√ is used for the

• Positive square root A
• Negative square root B
• +ve and -ve square root C
• Whole number D

• 
  A
• 
  B
• 
  C
• 
  D

• Commutative law of multiplication A
• Closure law of multiplication B
• Associative law of multiplication C
• Multiplication identity D

∀x,y∈ R and x < 0, y < 0, which one is true 

• xy < o A
• xy = o B
• xy > o C
• None of these D

The square root of 2i - 20i is

• ±(5 - 2i) A
• ±(5+ 2i) B
• (5 - 2i) C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  D