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

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

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

i³=

• -1 A
• i B
• -i C
• 1 D

The additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

√x = ______ if is a prime number

• Rational no A
• Natural no B
• Irrational no C
• Complex no D

If z₁ =√-36 ,z₂ =√-25,z3 =√-16 then

• 15 A
• 15i B
• -15i C
• -15 D

• 
  A
• 1 B
• 
  C
• -1 D

Every recurring decimal represents

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

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

• 
  A
• 
  B
• 
  C
• 
  D

• real number A
• complex number B
• rational number C
• irrational number D

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

• 
  A
• 
  B
• 
  C
• 
  D

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

The additive inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

The value of x, and y, when (x + iy)²= 5 + 4i

• X = 2, y = 1 A
• X = -2, y = 1 B
• X = 2, y = -1 C
• X = 2, y = 2 D

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

• 
  A
• 
  B
• 
  C
• 
  D

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

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

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

• 
  A
• 
  B
• 
  C

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

The real number system contains.

• Positive Numbers A
• Negative numbers B
• Zero C
• (option a, b and c) D

The set of rationals numbers between 0 and I is

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

A non-terminating non_recurring decimal represents an

• Irrational no A
• Both a & c B
• Rational no C
• None of these D

14 is not a

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

The square roots of negative numbers is called

• Real no A
• Complex no B
• Positive no C
• Negative no D

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None 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 + 9 = 9 + 4

• Associative property of addition A
• Commutative property of addition B
• Distributive property C
• Additive identity D