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

In R, the additive identity is

• 0 A
• 1 B
• -1 C
• None D

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

Every recurring decimal represents

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

√23 is

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

The additive inverse of 1 is

• 1 A
• -1 B
• 0 C
• Does not exist D

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

• 15 A
• 15 i B
• -15 i C
• -15 D

• Associate law of addition A
• Commutative law of addition B
• Additive identity C
• Closure law of addition 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

∀x, y ∈ R, either x = y or x > y or x < y is

• Transitive property A
• Reflexive property B
• Trichotomy property C
• None of these D

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

• √5 A
• √7 B
• -1-2i C
• √3 D

i³=

• -1 A
• i B
• -i C
• 1 D

Every irrational number is

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

The set of rationals numbers between 0 and I is

• Finite A
• Null set B
• Infinite C
• None of these D

• 
  A
• 
  B
• 
  C
• 
  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

i² =

• 1 A
• 2 B
• -1 C
• 0 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

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

• Commutative law of multiplication A
• Closure law of multiplication B
• Associative law of multiplication C
• Multiplication identity 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

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

A non-terminating non_recurring decimal represents an

• Irrational no A
• Both a & c B
• Rational no C
• None of these D

(a,b) +(-a,-b) =

• (0,0) A
• (a,b) B
• (-a,-b) C
• (1,1) D

6 is

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

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

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D