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

i³=

• -1 A
• i B
• -i C
• 1 D

i^-(4n+2) = -------------------------------

• 1 A
• i B
• -1 C
• -i 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

• 
  A
• 
  B
• 
  C
• 
  D

• A prime number A
• An integer B
• A whole number C
• An irrational number D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

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

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

Q∪ Q' =

• Q A
• Q' B
• N C
• R D

6 is

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

i¹⁰¹=

• i A
• i² B
• -i C
• -1 D

The identity element with respect to subtraction is

• 0 A
• -1 B
• 0 and 1 C
• None of thes D

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

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

• 
  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D

The symbol of irrational is

• W A
• N B
• Q C
• Q' D

In R the number of identity element w.r.t '+' is

• One A
• Two B
• Three C
• Four D

∀a,b,c∈R and c>0,then

• a>b ⇒ ac < bc A
• a>b ⇒ ac > bc B
• a<b ⇒ ac > bc C
• None of these D

• A positive integer A
• A negative integer B
• A natural number C
• An irrational number D

• (a + b)c = a . c + bc A
• a + b = b + a B
• (a + b) + c = a + (b + c) C
• a(b+ c) = ab + ac D

• 
  A
• 
  B
• 
  C
• 
  D

In (x + iy), y is called as

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

• 
  A
• 
  B
• 
  C
• 
  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

• 
  
  
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

• 0 A
• 1 B
• -1 C
• 2 D

In polar form of complex number r =

• 
  A
• 
  B
• 
  C
• 
  D