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

1.4142135... is ______

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

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

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

The order axioms are satisfied by set of

• C A
• C and R B
• R C
• None of these D

(a+bi) - (c+di)=

• (a+b) = (c+d) A
• (a+c) + i(b+d) B
• (a - c) + (c- d)i C
• (a - c)+ (b - d)i D

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

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

∀a,b,c∈R, a >b ∧ b>c ⇒ a >c is

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

∀ z ∈ C, multipliucative is

• (1,1) A
• (1,0) B
• (0,1) C
• None of these D

QUQ, =

• N A
• R B
• W C
• Z D

0.25 is ______

• An irrational number A
• A natural number B
• A prime number C
• A rational number 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

• 
  A
• 
  B
• 
  C
• 
  D

a.a^-1= a^-1.a = 1 is a

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

In (x + iy) x is the known as

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

i² = 

• 1 A
• 2 B
• -1 C
• 0 D

The multiplicative inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 1 D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

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

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

What is the conjugate of -6 -i?

• -6 +i A
• 6+i B
• -6 -i C
• 6 -i D

• 
  A
• 
  B
• 
  C
• None of these D

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

Union of the sets of rational and irrational numbers is called 6th set of

• Natural numbers A
• Real numbers B
• Whole numbers C
• Prime numbers D

• additive property A
• multiplicative property B
• additive inverse C
• additive identity D

If Z = (1,2), then Z^-1= ?

• (0.2, 0.4) A
• (-0.2, 0.4) B
• (0.2, -0.4) C
• (-0.2, -0.4) D

202.04 is an example of

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

• Additive property of inequality A
• Commutative property B
• Additive inverse C
• Additive identity D

2/9,5/7∈ R,(2│9)(5│7)=10/63∈R this property is called

• Associative property A
• Identity property B
• Commutative property C
• Closure property w.r.t multiplication D