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

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

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 D

If z₁ = (a,b), z₂=(c,d), then z₁ z₂ = -------------------

• (ac,bd) A
• (ac+bd, ad-bc) B
• (ac-bd , ad+bc) C
• (ac-bd , ad-bc) D

• 
  A
• 
  B
• 
  C
• 
  D

The equation |x + 4| = x has solution

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

The sum of complex number (a,b) and (c,d) is

• 
  A
• 
  B
• 
  C
• 
  D

1/3 is ______

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

• 
  A
• 
  B
• 
  C
• 
  D

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 1 B
• -1 C
• 
  D

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

a >b ⇒a +c >b +c is known as

• Trichotomy property A
• Additive property of inequality B
• Transitive property C
• Multiplicative property D

The square roots of negative numbers is called

• Real no A
• Complex no B
• Positive no C
• Negative no D

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

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

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

The multiplicative inverse of 0 is

• 1 A
• -1 B
• 0 C
• Does not exist D

• Commutative law of addition A
• Associative law of addition B
• Additive identity C
• Additive inverse D

4/√49 is a

• Irrational Number A
• Prime Number B
• Rational number C
• Whole number D

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

For each real number, there is a number which is its

• Negative A
• Possitive B
• Opposite C
• Similar 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

• 
  A
• 1 B
• 
  C
• -1 D

√2 is a number

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

If a set S contains n elements then P (S) has ........ number of elements

• 2ⁿ A
• 2ⁿ² B
• 2.n C
• n² D

Every real number is

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

• real part of z A
• imaginary part of z B
• conjugate of z C
• modulus of z D

a.a^-1 = a^-1.a = 1 is a

• Commutative law of multiplication A
• Multiplicative identity B
• Associative law of multiplication C
• Multiplicative inverse D

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

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D