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

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

The set {0,-1} hold closure property under

• Addition A
• Both a & c B
• Multiplication C
• None of these D

3.5+5.4=5.4+3.5 =8.9 this property of addition is called

• additive identity A
• assoclative property B
• commulative property C
• closure property D

Every real number is

• A complex number A
• A rational number B
• A natural number C
• A prime number D

• 
  A
• 
  B
• 
  C
• 
  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

Every irrational number is

• A real number A
• A prime number B
• A natural number C
• An integer D

Additive inverse of - a - b is

• a A
• -a + b B
• a - b C
• a + b D

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

• 
  A
• 
  B
• 
  C
• 
  D

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

• 
  A
• 
  B
• 
  C
• 
  D

√2 +√3 +√5) = (√2 +√3 +√5: this property is called

• associative property w.r.t addition A
• commutative property B
• Closure property w.r.t addition C
• Additive identity D

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

If 4 > b or a < b than a = b is a

• Additive property A
• Transitive property B
• Trichotomy property of inequality C
• None of above D

Every recurring decimal represents

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

The polar form of complex number x ≠ I y =

• r cos θ+ r sin θ A
• r cos θ+ is sin θ B
• cos θ+ r sin θ C
• i cos θ+ i sin θ D

(a^-1)^-1=

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

• 
  A
• 
  B
• 
  C

π is ______

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

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

1/3 is ______

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

The multiplicative inverse of 1 - 2i is

• 
  A
• 
  B
• 
  C
• 
  D

I is not

• Real number A
• Natural number B
• Prime Number C
• Whole 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

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

• 
  A
• 
  B
• 
  C
• 
  D

i is equal

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

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

• 
  
  
  A
• 
  B
• 
  C
• 
  D