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

The additive identity of real number is

• 1 A
• 2 B
• 1/2 C
• 0 D

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

• Negative A
• Possitive B
• Opposite C
• Similar D

The square roots of negative numbers is called

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

∀ a ε R ∃ o ε R such that a + v = 0 + a = a is property of

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

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

• One A
• Two B
• Three C
• Four D

The additive inverse of 2/3 is

• 3/2 A
• -2/3 B
• -3/2 C
• 0 D

The√ is used for the

• Positive square root A
• Negative square root B
• +ve and -ve square root C
• Whole number D

The product of complex numbers (a,b) and (c,d) is

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

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

• 
  
  
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

√(-1b) =?

• b i A
• -i b B
• b2 C
• i√b D

• 
  A
• 
  B
• 
  C
• 
  D

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

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

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

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

• 
  A
• 
  B
• 
  C
• 
  D
• 
  E

Which of the following has the same value as i¹¹³?

• i A
• -1 B
• -i C
• 1 D

• 
  A
• 
  B
• 
  C
• 
  D

• 
  A
• 
  B
• 
  C
• 
  D

The multiplicative inverse ofx^(-1) is

• x A
• a-2 B
• 0 C
• 1 D

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

• One A
• Two B
• Three C
• Four D

The multiplicative inverse of -3i is

• 3i A
• -3i B
• -1/3i C
• 1/3 i D

∀x,y∈ R and x < 0, y < 0, which one is true 

• xy < o A
• xy = o B
• xy > o C
• None of these D

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

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

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

• 
  A
• 1 B
• -1 C
• 
  D

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

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