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

∀a,b, c ε R,a +c = b + c = > a = b

• Reflexive property A
• Symmetric property B
• Cancellations property w.r.t. addition C
• Transitive property 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

Zero is

• An irrational number A
• A rational number B
• A negative integer C
• A positive number 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

Name the property used in 4.1 + (-4.1) = 0

• Additive inverse A
• Multiplication inverse B
• Additive identity C
• Multiplication identity D

• are real no A
• both are not real B
• are imaginary no C
• both are imaginary D

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

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

Total number of subsets that can be formed out of the set {a,b,c} is

• 1 A
• 4 B
• 8 C
• 12 D

Which element is the additive inverse of (a,b) in Complex numbers

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

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

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

Every real number is

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

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

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

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

• 
  A
• 
  B
• 
  C
• 
  D

• Closure law of addition A
• Associative law of addition B
• Commutative law of multiplication C
• Associative law of multiplication D

In R, the multiplicative inverse of a is

• 0 A
• 1 B
• -a C
• 1/a D

4/√49 is a

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

• Additive property of inequality A
• Commutative property B
• Additive inverse C
• Additive identity D

i² =

• 1 A
• 2 B
• -1 C
• 0 D

The set of rational number is represented by

• W A
• R B
• Q' C
• Q
  
  
  D

In (x + iy) x is the known as

• Imaginary part of complex number A
• Real part of complex number B
• Complex number C
• None of above D

• 
  A
• 
  B
• 
  C
• 
  D

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

• z is purely imaginary A
• a is any complex number B
• z is real C
• None of these D

Associative law of multiplication

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

3/2 is

• An irrational number A
• Whole number B
• A positive integer C
• A rational number D

The multiplicative inverse of 4 is

• -4 A
• -1/4 B
• 1/4 C
• 1 D

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

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

(a-1)-1 =

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

• 
  A
• 
  B
• 
  C
• 
  D