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

• 
  A
• 
  B
• 
  C
• 
  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

• 
  A
• 
  B
• 
  C
• 
  D

For any real numbers x,y,xy=o ⇒

• x ≠ 0 ∧ y ≠ 0 A
• x = 0 ∨ y = 0 B
• x = 0 C
• y = 0 D

√23 is

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

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

• 
  A
• 1 B
• 
  C
• -1 D

2.333....is a

• Irrational no A
• Complex no B
• Rational no C
• None of these D

Every recurring decimal represents

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

• a = a A
• a < a B
• a > a C
• a²= a 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

The symbol of irrational is

• W A
• N B
• Q C
• Q' 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

• 1 A
• 3 B
• 2-i C
• -1 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 positive integer A
• A negative integer B
• A natural number C
• An irrational number D

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

A prime number can be a factor of a square only if it occurs in the square at least

• Once A
• Thirce B
• Twice C
• None of these D

If Z₁= 1 + i, Z₂= 2+3i, then |Z₂- Z₁| = ?

• 
  A
• 
  B
• 
  C
• 
  D

• N A
• r B
• 2r C
• π D

• 15 A
• 15 i B
• -15 i C
• -15 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

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

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

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

• 1 A
• -1 B
• 
  C
• 
  D

The equation |x + 4| = x has solution

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

i is equal

• (1 , 0) A
• (0 , 1) B
• (1 , 1) C
• (0 , 0) D

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

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