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

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

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b D

• 
  A
• 
  B
• 
  C
• None of these D

Every whole number is

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

Name the property used in 100 + 0 = 100

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

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

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

Every real number is

• a positive integer A
• a rational number B
• a negative integer C
• a complex number 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

In (x +iy) y is called as

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

• 
  A
• 1 B
• 
  C
• -1 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

(a^-1)^-1=

• a^-1 A
• a B
• -a C
• None of above D

i³ =

• -1 A
• i B
• -i C
• 1 D

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

Some of two real numbers is also a real number , this property is called:

• Commutative property w.r.t addition A
• Closure property w.r.t. addition B
• Associative property w.r.t. addition C
• Distributive property w.r.t addition D

A subset of set of complex number whose elements are of the form (a,0) is called

• Real number A
• Complex number B
• Rational number C
• Irrational number D

QUQ'

• 
  A
• 
  B
• 
  C
• 
  D

If 0 = R, thenthe additive inverse of a is

• 1/9 A
• ^1/-9 B
• a C
• -a D

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

(√3+√5)+√7 = √3 +(√5 +√7) property used in above is

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

(a-1)-1 =

• a-1 A
• a B
• -a C
• None of above D

In R, the additive inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

∀x,y∈R and x> 0 , y>0, if x > y

• 
  A
• 
  B
• 
  C
• None of these D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

• A rational number A
• A irrational number B
• An even integer C
• A factor of 36 D

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

The equation |x + 4| = x has solution

• x = -2 A
• x = 2 B
• x = -4 C
• x = 4 D

What is the conjugate of -7 -2i?

• -7 + 2i A
• 7 + 2i B
• 7 -2i C
• None of these D

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

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